2nd Mass. chemist accused of evidence tampering - Article Photos 1/1

This undated photo provided by the Massachusetts Attorney General's office shows Sonja Farak. Farak a chemist at a state crime lab tampered with drug evidence, authorities said Sunday, Jan. 20, 2013 in Massachusetts, where another chemist at a different lab was accused last year of faking test results in a scandal that threw thousands of criminal cases into question. (AP Photo/Massachusetts Attorney General)