A small pile of a substance believed to be heroin sits on a scale at the state drug testing lab in Augusta, Aug. 12, 2015. Maine drug agents and Dexter police arrested a Dexter man who was allegedly in possession of $15,000 worth of heroin, according to authorities.

The Maine Drug Enforcement Agency and local police arrested a man in Dexter on Monday evening following a month-long investigation that involved purchasing drugs directly from the suspect. They seized heroin worth at least $15,000 and more than $2,600 in drug proceeds in the process.

Maine drug agents and Dexter police arrested 30-year-old Herbert Simonds Jr. after searching his residence at 120 Main St.

Simonds faces charges of aggravated trafficking in heroin, a Class A crime that carries a maximum penalty of 30 years in prison and a $50,000 fine.

He is being held at the Penobscot County Jail in Bangor, according to Maine Department of Public Safety spokesman Stephen McCausland, and his bail is set at $10,000.