Thousands of US drug convictions overturned by rogue chemist's actions

Misconduct by a former Massachusetts forensics chemist who worked in a state crime lab from 2003 until her arrest in January 2013 will result in the dismissal of more than 6000 drug convictions across the state, according to new filings from the district attorneys of several Massachusetts counties.Sonja Farak was convicted in January 2014 and was jailed for 18 months after pleading guilty to tampering with evidence in drug cases, stealing illegal drugs from the lab where she worked, and cocaine possession