BELOIT, WI (WTAQ) - A convicted heroin dealer from Beloit has been sentenced to 20 years in prison. 38-year-old Maurice Vaughn was found guilty in January of distributing heroin. Witnesses testified in a three-day trial that Vaughn supplied 50-to-80 bags of heroin each day to a pair of associates, who delivered the drugs after Vaughn arranged the deals. The case prompted an investigation in 2010, due to a spike in the number of Beloit residents who died from drug overdoses. Vaughn had earlier served a 10-year federal sentence for drug trafficking. Federal Judge William Conley of Madison said a tougher sentence was justified this time, because Vaughn’s original term did not deter him from his continued drug dealing.