Prosecutors had to dismiss 600 drug cases in the wake of the San Francisco drug lab scandal. The lab was shut down on March 9, 2010 when it was discovered that a former lab technician was accused of skimming cocaine evidence on Police drug tests.
Independent audits of the crime lab also found problems with mismanagement and understaffing.
The police department has moved to utilizing outside drug testing facilities and the city of San Francisco fears that the costs could rise to about $100 / test. The police lab did about 14,000 tests / year.