When Hastings police encountered Matthew Jensen, he was nearly passed out, groaning in the passenger seat of his girlfriend's car, his eyes rolled back in his head and white foam oozing from his mouth.
A friend said Jensen had just injected heroin into his arm. Officers found a spoon with white residue next to the unresponsive Jensen. A plastic baggie with a brown powder was found in his friend's purse and confiscated.
In charging Jensen in the July 15, 2009, incident, Dakota County prosecutors say testing by the St. Paul police crime lab proved the substance police found on the spoon and in the baggie was heroin.
But now the validity of that claim -- and of thousands of other cases handled by the St. Paul crime lab over the years -- have come into question after revelations last week of shoddy work and unsound practices.
County attorneys, defense lawyers and the judicial system are preparing for a possible avalanche of new filings and hearings as defendants seek to get their convictions overturned because of the lab's supposedly shoddy work for prosecutors.
"If they are all tainted, then we have a massive problem, unprecedented in the state of Minnesota," attorney Marshall Tanick said. "If there are a number of these cases, it will be a very expensive proposition for the taxpayers."
The accusations about the St. Paul lab were made in Dakota County District Court by Jensen's attorneys, Lauri Traub and Christine Funk, who are challenging the St. Paul lab's work in eight drug cases. In testimony last week, lab staffers admitted to numerous shortcomings that threw its science into doubt.
"It was egregious," Pete Orput, the Washington County attorney, said when asked to comment on the lab's behavior. "This was to me a shock."