A North Kansas City man sentenced Monday to 18 years in federal prison for felony firearm possession also was implicated in a Sept. 2015 murder in Independence.

DeMarko Collins, 28, was sentenced to consecutive nine-year terms for two counts of illegally possessing a firearm. He had pleaded guilty in September 2016 to being a felon in possession of a firearm and possessing a stolen firearm. According to a federal court release, Collins' sentence was longer than federal guidelines because of his violent, criminal past and the murder implication.

Collins has been in federal custody since his Sept. 30, 2015 arrest. At the time of his federal offense, he was being investigated for the Sept. 18, 2015, murder of David Duncan. The 45-year-old Duncan was shot in front of his house in the 16900 block of 41st Terrace in a neighborhood off Lee's Summit Road just south of Interstate 70.

According to court documents, Collins had been feuding with Duncan, believing he had paid someone to murder Collins' cousin. At the sentencing hearing attorneys showed evidence Collins had staked out Duncan's home over the course of two days, and when Duncan arrived home the morning of Sept. 18, Collins stepped out of a vehicle and shot him multiple times with a rifle.

At that time, Collins was three months removed from parole on a carjacking charge to which he pleaded guilty in 2009. He had been sentenced to six years, eight months in federal prison.

Investigators located the suspect vehicle in security camera footage at a nearby gas station a couple hours before the shooting, with Collins as the driver. The vehicle was registered to his girlfriend. Officers then searched his apartment on Sept. 30, found a .45-caliber pistol in a kitchen cabinet that had been reported stolen.

State charges have not yet been filed in the Duncan murder case.

According to court documents, Collins was a member of the Cripps street gang who referred to himself as “the biggest gang member in Kansas City.” He admitted to trafficking multiple pounds of marijuana – an estimated 200 pounds prior to his arrest – and also admitted to stabbing two inmates while in federal prison, according to court documents.

According to court records, Collins has pleaded guilty to state charges of tampering with a motor vehicle in 2007, second-degree robbery in 2007 and resisting arrest in 2013, all in Jackson County.