Published: Dec 31, 2010 11:15 PM EST
Updated: Dec 31, 2010 8:16 PM EST

SAN FRANCISCO (AP) - Prosecutors will not file criminal charges against the former San Francisco crime lab technician who acknowledged snorting cocaine taken from evidence.

 The California Attorney General's Office said Friday there wasn't sufficient evidence to charge Deborah Madden.

She was accused of stealing small amounts of cocaine from the lab while working there in late 2009, which led to the lab's closure and the dismissal of more than 600 drug cases.

 San Francisco prosecutors asked the attorney general's office in April to investigate.

Madden's attorney said his client is ecstatic about the attorney general's decision. San Francisco's police chief said he was disappointed but respects the ruling.

(Copyright 2010 by The Associated Press. All Rights Reserved.)