Robin Cobb Franklin County Sheriff’s Office photo FARMINGTON — The state has dismissed an aggravated trafficking in methamphetamine charge against a Washington Township man for insufficient evidence, according to a document filed in District Court.The document was signed by Assistant Attorney General David Fisher. No further information was available Tuesday. A Maine Drug Enforcement agent arrested Robin Cobb, 46, on Aug. 21 after two packages containing about 2 kilograms of a powdery white substance arrived at the Wilton Post Office for him. When Cobb arrived to pick up the packages addressed to him from Chino, California, he was taken into custody by postal inspectors and investigators from the Maine Drug Enforcement Agency. Cobb told investigators the packages contained isopropylbenzylamine, a legal substance, which he uses to clean headlights for other people. He told police he pays about $150 for a kilogram of the substance, ordering it online. The agency had … [Read more...] about State dismisses meth charge against Washington Township man