CONWAY, Massachusetts, Apr 2: A chemist who worked at a Massachusetts state drug lab was indicted yesterday on state charges of tampering with evidence and stealing cocaine held in evidence, in the second case against a state chemist in recent months. Sonja Farak, who has been suspended with pay from her position at a state drug lab in western Massachusetts, was charged with theft of a controlled substance from an authorized dispensary and tampering with evidence, and possession of a Class B substance, Massachusetts Attorney General Martha Coakley said in a statement. (agencies)