A gunman opened fire  yesterday at the Maryland company where he worked, killing three co-workers and critically wounding two others before driving to Delaware, where he shot another man.

Radee Labee Prince, who had worked for four months at Advanced Granite Solutions, a kitchen countertop company in Edgewood, Maryland, arrived at the start of his 8:30 a.m. shift and opened fire with a handgun.

Although police reportedly arrived on the scene four minutes after the first 911 call, Prince had already fled – to a used car dealership in Wilmington, Delaware. That’s where he shot and critically wounded a man with whom he “had some past history,” according to Wilmington police chief Bob Tracy.

Police say Prince knew all of his victims in yesterday’s shootings. His motive is still unknown.

Police in both states coordinated on a massive manhunt for Prince. He was captured last night in Delaware by Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) agents just after 7 p.m. 

Prince has an extensive criminal history that includes 47 felony convictions. News sources said that in 2015, Prince was charged in Cecil County, Maryland with being a felon in possession of a firearm and carrying a handgun in a vehicle. Both charges were later dropped.