All of this is going on within an ASCLD certified police crime lab.  In Louisiana,of course.

The Innocence Project and the Baton Rouge District Attorney battle over how far the Innocence Project can go to locate evidence that may exonerate a man.  Roy Morgan is imprisoned for a rape based on the account of a single eyewitness and wants to perform DNA testing to prove his innocence.  The Baton Rouge District Attorney, whose office has a record of misplacing evidence, claims that the evidence is lost.  The Innocence Project wants a chance to search the evidence room to see if the evidence is truly lost or is, again, misplaced (New Orleans Advocate) Thanks to NY Legal Aid Society

Its history of lost and stolen crime lab evidence. 9WAFB 

Baton Rouge is not alone in the crime lab world of mistakes or worse. Houston

Bogus drug testing police kits. $2 from KMART.