Showing posts with label Expert Witness. Show all posts
Showing posts with label Expert Witness. Show all posts

Wednesday, September 28, 2022

Cross-Examining Experts: Make Their Expert Yours

Prior articles here (Cross-Examination: Think My Cousin Vinny and  Catching the Truth on Cross-Examination) focus on the CONTENT of cross-examination. The core concept is that the primary purpose of cross-examination is to gain concessions and those concessions make up the content of your cross. Impeachment is only a secondary goal. Each concession that you are seeking is the truth that the witness must admit or stamp the answer given as a lie mistaken or ridiculous because you can prove the truth that is sought, or the truth just makes common sense. 

Many experts are particularly susceptible to concession-based cross-examination because they want to remain credible in the scientific community and don’t want to bend or break the truth with their testimony. Some experts, yes, will exaggerate, mince words and evade. This is particularly true with the soft sciences, such as psychiatry or psychology. Dr. Dean Hawley, a pathologist in Indiana, put it this way: “Is the expert qualified? Is the expert truthful? If the expert is qualified and truthful, make the expert your star witness.”

Now, watch the prosecutor do a concession-based cross-examination of the defense expert in the manslaughter trial of Dr. Conrad Murray for killing Michael Jackson. The prosecutor turns the defense expert into the prosecution’s star witness.


Here are three examples of low hanging fruit for a cross-examiner of a qualified and truthful expert. First, make the expert concede the validity of the science. Second, have the expert concede that your expert used the proper scientific technique. Third, have the expert concede that your expert has an excellent reputation in the scientific field. 






Thursday, August 15, 2019

NEW TRIAL BOOK: SIX CAPSULES: THE GILDED AGE MURDER OF HELEN POTTS-- BOOK REVIEW



George R. (Bob) Dekle, Sr. has done it again. He has written Six Capsules:  The Gilded Age Murder of Helen Potts. It is another splendid book by Bob—this time a “true crime book” that recounts the poisoning of Helen Potts by Carlyle Harris and the high profile murder trial of Harris in the late 19th century.

Bob’s prestigious list of prior books, among others, includes: Cross-ExaminationHandbook: Persuasion, Strategies, and Techniques (which I co-authored along with William Bailey); The Last Murder: The Investigation, Prosecution, and Execution of Ted Bundy (2011); The Case against Christ: A Critique of the Prosecution of Jesus (2011); Abraham Lincoln's Most Famous Case: The Almanac Trial (2014); Ted Bundy, Celebrity Slayer (2014 Kindle ed.); The Lindbergh Kidnapping Case: A Critical Analysis of the Trial of Bruno Richard Hauptmann; Chronicles of Crime and Criminals: Thirty Two Years in the Courtroom (2017 Kindle ed.); and Prairie Defender: The Murder Trials of Abraham Lincoln (2017).


New York assistant district attorney Francis L. Wellman, who prosecuted Harris, was a familiar character to Bob Dekle because Wellman wrote the second best book on cross-examination entitled The Art of Cross-Examination, second only to Bob’s Cross-Examination Handbook. Notable is the fact that The Art of Cross-Examination is still in print, and, despite its somewhat archaic language, it is still filled with excellent advice regarding how to conduct cross-examinations.
A highlight in Six Capsules is Bob’s description of Harris’s cross-examination of a defense expert witness Dr. Horatio Wood along with Bob’s observations about how Harris conducted the cross. Carlyle Harris was a young medical student who was alleged to have poisoned Helen Potts with morphine to prevent disclosure of the fact that he had convinced her to secretly marry him under assumed names.
Dr. Horatio Wood of the University Hospital in Philadelphia was the defense witness expert upon whom the defense case rested. On direct examination, Wood in essence testified that given that the body had been embalmed and buried for a length of time, it was not possible to determine the cause of death and that her symptoms were “compatible with various conditions.”
I can’t do justice here to either how Bob describes Wellman’s cross of Wood or Bob’s analysis of Wellman’s strategies and skills as a cross-examiner. Suffice it to say, Wellman did the following:
·      Challenged Wood’s opinion that morphine poisoning could not be diagnosed based upon symptoms.
·      Took advantage of Wood’s assertion that a definitive diagnosis could not be reached based upon symptoms but a physician confronted with them would come to a working diagnosis she had been poisoned.
·      Attacked Wood’s qualifications—Wood had seen only one case of morphine poisoning and that was 20 years before the Harris trial.
·      Examined Wood with a portion of his book in which he stated: “I have thought that inequality of pupils is proof that a case is not one of narcotism; but Professor Taylor has recorded an instance of opium-poisoning in which it occurred.” Then, Wellman confronted Wood with the fact that Taylor’s case involved a man with one eye. (This was followed with laughter from the spectators.)
·      Wellman concluded with “You may go back to Philadelphia, sir.”
Bob Dekle is a meticulous researcher, and he reported what the newspapers said of Wood’s trial performance under Wellman’s cross, as follows:
“The Herald reported that when Jerome dismissed Wood from the witness stand, the doctor ‘hurried away from the witness stand with that pained expression sometimes visible on the face of a picnicker who sat on an anthill.’ Upon Wood’s return to Philadelphia, he remarked that he had ‘gone to New York only to make a fool of himself.’ . . .”
To get both the full enjoyment of a true crime history book and insights into effective trial practice, particularly cross-examination, read  Six Capsules.



Sunday, May 21, 2017

CROSS-EXAMINATION OF DNA EXPERT

CROSS-EXAMINATION OF DNA EXPERT

For my Comprehensive Trial Advocacy course, Seattle University law students attend a day in trial and report on what they observed because that is a good way to learn the realities of trial practice. It is gratifying to read the students’ reports and to learn how being in the courtroom can be such a rewarding learning experience for them. 

Student Adam Brenneman attended a murder trial involving DNA evidence. The defendant Emanuel Fair was charged with murder in the first degree with sexual motivation. The defendant was at a party the night victim Arpana Jinaga was killed and was a friend of a woman who lived downstairs from victim. When Jinga’s body was discovered in the apartment, she was naked and her body was soaked in bleach and motor oil apparently used to obliterate any trace of DNA evidence. Police gathered items from the scene that the state crime lab could analyze.

The recovered DNA samples were degraded, mixed samples. The Washington State Crime Laboratory concluded that the blood on the victim’s robe was 1000 times more likely to contain the defendant’s DNA. However, TrueAllele, a software program, which relies on sophisticated algorithms to analyze DNA mixtures, determined that same blood was 56.8 million times more likely to include Fair’s DNA.

Adam Brenneman arrived in King County Superior Court courtroom in time to observe the cross-examination of Mark Perlin, CEO of Cybergenetics, the company that developed TrueAllele. The following are the student’s reflections on the cross-examination of Mr. Perlin.

CROSS-EXAMINATION OF DNA EXPERT
By Adam Brenneman

Mr. Perlin, an expert witness, is the owner of a DNA coding software company, TrueAllele.

During the portion of the cross examination observed, the defense was attempting to impeach and discredit Mr. Perlin by 1) challenging the process of the software, 2) pointing out the subjective portion of the process of the DNA coding using the software, 3) addressing inconsistent results between different runs of Mr. Perlin’s software, 4) challenging the result of Mr. Perlin’s software in relation to other DNA coding software.  Subsequent research outside the courtroom indicates that this case is the first case in Washington State in which software that analyzes DNA has been used by the prosecution; this type of software is also being used in other state for the same purpose.  Previously, such software has only been used to exonerate defendants in Washington State.

In addition to attacking the software itself, defense counsel also attempted to impeach Mr. Perlin using his Sound Cloud social media page, on which he posted personally written songs about a variety of topics including DNA coding and crime laboratory personnel.  The defense counsel read out loud verses from two the songs.  Defense counsel slightly misquoted the songs, these errors quickly corrected by the witness.  The mistake and quick response by the witness made the witness appear very intelligent and the defense counsel less so.  It was unclear how this played with the jury, but one has to assume if the effort is to discredit the designer of software that anytime you make the software designer (Perlin) look more intelligent, it is a bad result.

            The cross was very technical and defense counsel included a number of technical charts in a PowerPoint deck.  The charts were very difficult to read on the projector screen.  This required the witness to stand up and walk to the projector screen.  As noted below in relation to the federal courtroom, the superior court was very outdated. (Mr. Brenneman had also observed a trial in Federal Court and written a report on that experience).

            Defense counsel also allowed the expert to make extra statements outside the questions asked and generally did a poor job locking down the witness, who if he did not have the upper hand certainly was not being controlled by the attorney.

PostScript

The trial ended in a hung jury. And, the King County Prosecutor’s Office was considering whether or not to retry the case.


For more on the case, read this article in the Seattle Weekly.

Saturday, January 23, 2016

ART OF CROSS-EXAMINATION AND THE GLASS EYE

Francis Wellman, author of The Art of Cross-Examination and a turn-of-the-twentieth-century New York prosecutor is reputed to have litigated more than 1,000 jury trials over the course of a 30 year career at the bar. During that time he gained a well-deserved reputation as a deadly cross-examiner, and his contemporaries could not mention him without also mentioning the first case in which he showcased his considerable talents—the Carlyle Harris murder trial.

Harris, a brilliant but flawed medical student at the New York College of Physicians and Surgeons, fancied himself something of a Don Juan, boasting that he could have any woman he wanted by fair means or foul. If he could have them no other way, he would talk them into a secret marriage under assumed names and then abandon them. Then he met, wooed, and won Helen Potts, a beautiful but demur girl of 19 who refused his advances until he proposed a secret marriage. Helen’s mother discovered the secret marriage and began lobbying Harris to publicly marry her daughter on pain of being scandalously exposed as a blackguard. Harris felt he could not stand exposure for three reasons: (1) It would crimp his style as a seducer of young women; (2) it would get him kicked out of medical school as morally unfit to practice medicine; and (3) it would prompt his rich grandfather to disinherit him.

Less than two weeks before Mrs. Potts’s deadline for the public marriage, Helen died after taking a headache remedy prescribed for her by Harris. The symptoms were those of morphine poisoning, and the autopsy revealed morphine poisoning. Harris was indicted for murder, and his lawyers defended on the theory that the young lady could just as easily have died of uremic poisoning. The prosecution’s “smoking gun” proof of morphine poisoning was the fact that prior to death Helen’s irises had symmetrically contracted until her pupils were mere pinpoints. All the prosecution experts testified that this symmetrical contraction of the pupils was evidence of morphine poisoning and nothing else.

The defense called an eminent expert from an out-of-town medical school, a scholar who had written extensively on the subject, to testify that the “smoking gun” was no such thing. As a matter of fact, he was aware of one case of morphine poisoning where only one iris contracted to a pinpoint and the other remained dilated. This emphatic testimony from such a highly credentialed expert had the spectators in the packed courtroom whispering that the prosecution had lost the case—but Wellman had not cross-questioned yet. We will allow Wellman himself to describe what happened when he undertook the cross-examination of the expert:

If Jerome [the defense attorney] could succeed in discovering a single authentic case where the pupils were not symmetrically contracted and where death had resulted from an overdose of morphine, the defense he had constructed with such diligence and skill would win his case, or as he probably would have expressed it "do the trick."

Accordingly he made a trip to Philadelphia and there found just the witness he needed in the person of a sweet old Professor Doctor who called himself a toxicologist and who claimed that he had made a specialty of the study of the effects of poisons for about forty years.

On the witness stand this witness lived up to Jerome's fondest hopes and gave it as his unqualified opinion that symmetrical contraction of the pupils of both eyes could not be relied upon as excluding all other causes of death but morphine. He had known a case of undoubted death from morphine, where the pupil of only one eye was contracted, the poison not having affected the other eye in any way.

If this testimony had stood the test of cross-examination, Jerome's ambition to acquit Harris would have been accomplished and with it perhaps his own reputation as an outstanding trial lawyer, but (and I cite it as still another striking example of the important part preparation plays in the outcome of a case) it so happened that I had had, roughly speaking, about five thousand cases of morphine poisoning examined and tabulated. I knew that in only one of them had the drug failed to contract both pupils symmetrically to a pin point.

Because of this investigation I thought I saw a chance to spring one of my favorite surprises. If I could lead up to it cautiously enough I might create a situation where I could pull a genuine rabbit out of the hat and perhaps even decide the case then and there.

By easy steps I persuaded the Professor to admit that the one case he had mentioned contradicted all his previous notions about the effect of morphine poisoning. BUT (now I felt that I was on dangerous ground)-

Q: Was it in the case of one of your own patients?
A: No.

Q: Was it ever authentically recorded in any medical book?
A: No.

Q: Do you know in what city the patient died?
A: Washington, D. C.

Q: Had you obtained you information about the case mainly from the Washington newspapers?
A: I had. [I was getting nearer and nearer to the identification of the one exceptional case that had been furnished me].

Q: Do you know the patient's name?
A: I don’t remember.

Q: Could I refresh your memory?
A: Perhaps. (And now I nearly stopped breathing).

Q: Was the name Mr. ---?
A: Yes. I remember it now.

Q: Did you personally investigated the case?
A: No.

Q: Well, perhaps it will interest you to know that I have investigated it and in the case you have referred to the patient had one glass eye?

Jerome nearly collapsed, along with his defense. He fairly begged the Judge to adjourn the court and give him an opportunity to investigate further (but really to get his second wind). It was no use. He tried hard the next morning with some new doctors, but his client's liberty had gone out of the window the afternoon before.

This account, which comes from Wellman’s autobiography, Luck and Opportunity, written some 40 years after the trial, is an example of two things (1) the value of preparation in dealing with an overconfident expert, and (2) the fallibility of eyewitness testimony. Wellman got the gist of the story right, but as he told and retold the story over the decades his performance became far more dramatic than it actually was. The actual transcript of that portion of Wellman’s cross-examination reads as follows:

Q. Now you state, do you not, that the symptoms [symmetrical contraction of the irises] could not be told of morphine poisoning with positiveness?
A. Yes, sir.

Q. That that was your best opinion upon your reading and upon your own experience; your own experience in twenty years is confined to one case; is your reading confined to your own book?
A. No, sir.

Q. Is your reading confined to your own book?
A. No, I say no.

Q. But I suppose you embodied in your book the results of your reading, didn't you?
A. I tried to, sir.

Q. Allow me to read to you from page 166.

THE COURT: Of what?

Mr. WELLMAN: Of his own book on Therapeutics and its Practice. (Reading.) "I have thought that inequality of the pupils"—that is where they are not symmetrically contracted—" I have thought that inequality of the pupils is proof that a case is not one of narcotism; but Prof. Taylor has recorded a case of opium poisoning in which it occurred."

Q. So that until you heard of the case that Prof. Taylor had reported in which it occurred, your opinion before that was that it never had occurred, symmetrical contraction of the eyes, besides morphine poisoning?
A. No, sir.

Q. Now, did you inquire and did you inform yourself that the case of which Professor Taylor spoke, was a case where a man had one eye?

[Objection by Mr. Jerome overruled].

Q. Before you made the statement in your book that the case Professor had cited, did you look it up and find that it had one eye? Yes or no?
A. Not according to my remembrance.

Wellman actually made the point he remembered, but he did not make it in quite as dramatic a fashion as he remembered. He also misremembered Jerome’s collapse. After Wellman had scored his point on the witness, Jerome immediately jumped up to try to repair the damage on redirect examination. He did not collapse until the following day, when he became completely exhausted and disoriented while conducting the direct examination of another expert witness. The trial was at that time in its third week, and both he and Wellman were near the point of total collapse. Judge Smyth gave the lawyers a three day weekend, and Jerome came back strong on the following Monday, fighting like a tiger to save his client from the gallows.