Former state crime lab chemist Annie Dookhan was arrested without incident at her home in Franklin today around noon.She's accused of faking drug test results that has left the outcome of thousands of criminal drug cases in question.

Attorney General Martha Coakley says the criminal investigation is ongoing.

Coakley acknowledges what she describes as a "severe credibility issue" on any cases Dookhan has been involved with.

The AG says Dookhan has been cooperative on any cases she's been questioned about.

Coakley also indicated Dookhan is likely to face more than the two counts of obstruction of justice and one of falsifying her academic record that she currently faces. (MetroSource)