Norwalk police arrested a man on heroin charges after conducting a surveillance operation on Monday.
Norwalk police said their Special Services Investigators were observing Hopeton "Hot Daddy" Marsh at Ryan Park where they saw him making a drug deal.
When Marsh left the scene in his vehicle police pulled him over.
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Police said Marsh was caught with 16 bags of heroin as well as a loaded 9mm pistol with an altered serial number.
Police charged Marsh with criminal possession of a firearm, possessing a weapon in a motor vehicle, altering a firearm serial number, carrying a pistol without a permit, possession of narcotics With intent to sell, possession of narcotics with intent to sell near a school, criminal trespassing and operating with a suspended license.
Marsh is a six-time convicted felon out on parole, police said.
Marsh was set a $100,000 bond and released into the custody of Connecticut Parole.