Drug offense cases are always interesting, in part because in order to secure a conviction in most of these cases, the Commonwealth must establish through expert testimony that the substance the defendant was accused of possessing was indeed a controlled substance.
Because of this an a ruling that was handed down by the SJC in the past couple of years (Commonwealth v. Melendez-Diaz, 76 Mass. App. Ct. 229, 2010), in order to prove that the substance in question was indeed the controlled (illegal drug that the prosecution claims, it must bring in the actual chemist from the state crime lab to testify in court as to what the substance is, and how the chemist arrived at that conclusion. The chemist must testify as to what chemical tests were conducted on the substance, what machines or methodology was used in the testing process, the nature and extent of his or her expertise, experience and education, and a number of other key areas of inquiry. Hence, the role of the state lab chemist in these types of cases, as well as their qualifications and integrity, is extremely important.
So it was very troubling to learn today that a chemist that is employed in just such a capacity for the state crime lab, was accused of intentionally mishandling and manipulating evidence and testimony in potentially thousands of drug cases that were prosecuted between 2003 and March of 2012, when the chemist involved reportedly retired from state employment. Work in the state crime lab in Jamaica Plain was officially suspended by Governor Deval Patrick yesterday (Thursday.) The 10 chemists who are employed in that lab have been placed on paid administrative leave until they can be placed elsewhere.