(Radio Iowa) – Three men have been sentenced for robbing two marijuana dealers at gunpoint. Thirty-four-year-old Antoine Maxwell of Mason City has been sentenced to 30 years in federal prison for the robbery and for dealing meth and heroin. His father, Charleton Maxwell, was sentenced earlier this year to more than 17 years in prison. Prosecutors say the Maxwells and 32-year-old Chavee Harden of Waterloo conspired to rob Harden’s marijuana dealers of drugs and money. Harden was sentenced this week to more than 12 years in prison.

News releases from the U.S. Attorneys office indicate the Maxwells held guns to the heads of the people being robbed and threatened to kill them. Police later found the guns as well as the money and marijuana at Harden’s house.