A very important new SCOTUS case - Melendez-Diaz - Lap Reports are covered by Crawford v. Washington

June 25th, 2009 Rob Leonard Posted in Case Law Update, Urine Test, Blood Test, Chemical Test No Comments »

Melendez-Diaz v. Massachusetts was decided today by the United States Supreme Court.  This much anticipated opinion clears up the debate about whether certificates prepared by a lab technician or similar person are admissible against a defendant in trial without the witness being present to actually testify about what the certificate says.It is very clear that lab reports are produced in anticipation of trial and they are in fact “testimonial” as defined by Crawford v. Washington and Davis v. Alaska.  Those cases hold that the defendant has the right to confront the witnesses against him and that testimonial evidence shall not be admissible unless the witness is “unavailable” and the defendant has previously had the right to cross-examine the witness.Justice Scalia delivered the opinion of the court and was joined by Stevens, Souter, Thomas and Ginsburg.  Justice Kennedy wrote the dissent and was joined by Roberts, Alito, and Breyer.  The dissent argues that these reports should be exempt from the confrontation because they are not normal witnesses, they are neutral scientists.  Justice Scalia does a masterful job of demonstrating what a bunch of garbage that is.

 “Nor is it evident that what respondent calls “neutral scientific testing” is as neutral or as reliable as respondent suggests. Forensic evidence is not uniquely immune from the risk of manipulation. According to a recent study conducted under the auspices of the National Academy of Sciences, “[t]he majority of [laboratories producing forensic evidence] are administered by law enforcement agencies, such as police departments, where the laboratory administrator reports to the head of the agency.” National Research Council of the National Academies, Strengthening Forensic Science in the United States: A Path Forward 6–1 (Prepublication Copy Feb. 2009) (hereinafter National Academy Report). And “[b]ecause forensic scientists often are driven in their work by a need to answer a particular question related to the issues of a particular case, they sometimes face pressure to sacrifice appropriate methodology for the sake of expediency.”  A forensic analyst responding to a request from a law enforcement official may feel pressure—or have an incentive—to alter the evidence in a manner favorable to the prosecution.”

I really like the fact that Justice Scalia isn’t afraid to recognize that many times these “scientists” or other examiners are really playing for the home team.  Several other rationales for allowing this in without making the witnesses come were made by the dissent and all of them were shot down as well.  This really is simple…the defendant has the right to confront the witnesses against him so the prosecutor needs to bring them to court.Where do we go from here?  The court gave it’s blessing to two different ways to handle these witnesses.  Some states can require them in every case.  Some states have laws that makes the prosecutor give notice of intent to introduce the certificates and then the defendant has to object.  Either way will pass constitutional muster.As it relates to DUI cases, all blood and urine cases will need to have the witnesses from the lab there at trial.  Additionally, I believe that this case invalidates OCGA 40-6-392 (e) (1-3) and (f).  These statutes all deal with testimonial evidence that the defendant has the right to confront.The State had better bring the area supervisor to testify in their next breath test case if they want to get those certificates in.  All lawyers need to read this case and be able to articulate the proper objections.

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Urine Testing: The Basics

March 19th, 2009 Allen Trapp Posted in Driving under the Influence of Drugs, Urine Test No Comments »

     Urine samples are usually tested for drugs by using a screening test followed by gas chromatography-mass spectroscopy (GCMS).  The screening test is normally an enzymatic method of analysis that determines if the “signal strength” is at or above a cut-off level.  These tests employ reagents that interact with several different but related compounds (e.g., metabolites) and measure the total “signal strength” of all those compounds. 

     GCMS should be able to identify both the parent drug and any metabolite(s).  If a parent drug is identified, the metabolite should also be present.  For example, if a urine sample is positive for methamphetamine, it should also be positive for amphetamine. 

     In order for a test result to be reported as positive the amount of a compound should equal or exceed the cut-off level.  If the cut-off limit for the GCMS is not met, the result should be reported as negative.   In other words, sound science dictates that reports reading “lower than the lowest calibrator” should not be reported as positive.

     One final word about metabolites: Most metabolites are less psychoactive than the parent drug or are inactive, which means that they have no impact on the person.  If only an inactive metabolite such as carboxy THC is found in a urine sample, the metabolite did not affect driving. 

Written by Allen Trapp who is board certified by the National College for DUI Defense and the author of Georgia DUI Survival Guide Visit Website
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Urine Tests: False Positive Results for Drugs

August 14th, 2006 Allen Trapp Posted in Urine Test No Comments »

Substances that cause False Positive Drug Test Results

THC - Substances or Conditions which can cause false positives
Dronabinol (Marinol)
Ibuprofen; (Advil, Nuprin, Motrin, Excedrin IB etc)
Ketoprofen (Orudis KT)
Kidney infection (Kidney disease, diabetes) Liver Disease
Naproxen (Aleve)
Promethazine (Phenergan, Promethegan)
Riboflavin (B2, Hempseed Oil)

Amphetamines - Substances or Conditions which can cause false positives
Ephedrine, pseudoephedrine, propylephedrine, phenylephrine, or desoxyephedrine
(Nyquil, Contact, Sudafed, Allerest, Tavist-D, Dimetapp, etc)
Phenegan-D, Robitussin Cold and Flu, Vicks Nyquil
Over-the-counter diet aids with phenylpropanolamine (Dexatrim, Accutrim)
Over-the-counter nasal sprays (Vicks inhaler, Afrin)
Asthma medications (Marax, Bronkaid tablets, Primatine Tablets)
Prescription medications (Amfepramone, Cathne, Etafediabe, Morazone,phendimetrazine, phenmetrazine, benzphetamine, fenfluramine, dexfenfluramine,dexdenfluramine,Redux, mephentermine, Mesocarb, methoxyphenamine, phentermine,amineptine, Pholedrine, hydroymethamphetamine, Dexedrine, amifepramone, clobenzorex,fenproyorex, mefenorex, fenelylline, Didrex, dextroamphetamine, methphenidate, Ritalin,pemoline, Cylert, selegiline, Deprenyl, Eldepryl, Famprofazone) Kidney infection, kidney disease, Liver disease, diabetes

Opiates - Substances or Conditions which can cause false positives
Poppy Seeds
Tylenol with codeine
Most prescription pain medications
Cough suppressants with Dextromethorphan (DXM)
Nyquil
Kidney infection, Kidney Disease
Diabetes, Liver Disease

Ecstacy - Substances or Conditions which can cause false positives
Ephedrine, pseudoephedrine, propylephedrine, phenylephrine, or desoxyephedrine
(Nyquil, Contact, Sudafed, Allerest, Tavist-D, Dimetapp, etc)
Phenegan-D, Robitussin Cold and Flu, Vicks Nyquil
Over-the-counter diet aids with phenylpropanolamine (Dexatrim, Accutrim)
Over-the-counter nasal sprays (Vicks inhaler, Afrin)
Asthma medications (Marax, Bronkaid tablets, Primatine Tablets)
Prescription medications (Amfepramone, Cathne, Etafediabe, Morazone,phendimetrazine, phenmetrazine, benzphetamine, fenfluramine, dexfenfluramine, dexdenfluramine,Redux, mephentermine, Mesocarb, methoxyphenamine, phentermine, amineptine, Pholedrine, hydroymethamphetamine, Dexedrine, amifepramone, clobenzorex, fenproyorex, mefenorex, fenelylline, Didrex, dextroamphetamine, methphenidate, Ritalin, pemoline, Cylert, selegiline, Deprenyl, Eldepryl, Famprofazone) Kidney infection, kidney disease
Liver disease, diabetes

Cocaine - Substances or Conditions which can cause false positives
Kidney infection (kidney disease)
Liver infection (liver disease)
Amoxicillin, tonic water

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Blood and Urine tests for Methamphetamine

August 11th, 2006 Allen Trapp Posted in Urine Test, Blood Test, Chemical Test No Comments »

     If a person has taken methamphetamine, that individual should also have its metabolite amphetamine in his or her system. In other words, levels of both methamphetamine and amphetamine should be detected in both the blood and urine. Some GC/MS assays can falsely yield positive methamphetamine levels when high concentrations of ephedrine or pseudoephedrine are present in the specimen. Depending on the temperature of the injection port, the ephedrine or pseudoephedrine can be converted (or cooked) to methamphetamine. Therefore, sound scientific practice requires a negative report for methamphetamine if only methamphetamine is found in blood or urine. The absence of amphetamine means that the person had not consumed methamphetamine, which would in the ordinary course of metabolism would produce amphetamine. Therefore, in a case where only methamphetamine is found in the blood or urine the person probably had a cold and taken cold medicine containing ephedrine or pseudoephedrine.

Written by Allen Trapp who is board certified by the National College for DUI Defense and the author of Georgia DUI Survival Guide Visit Website
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