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Fox 5 reports that 20-year-old William Anthony Knight has been arrested in connection with the killing of 24-year-old Alonzo Guyton, a Howard University freshman and Marine veteran.

The shooting happened around 12:02 a.m. Tuesday on Kaywood Drive, Mt. Ranier. “Located on the crime scene was a witness who reported seeing a blue van flee the area immediately after the shots were fired,” Capt. Joe Hoffman of the Prince George’s Co. Police Dept. told reporters. P.G. Police found a 7.62 mm shell casing at the murder site, as well as a magazine from a Bernadelli 9mm handgun.

Minutes later, D.C. police got a report that a blue van had been involved in an accident in Northeast Washington. P.G. detectives reported to the scene of that accident to alert D.C. officers that the van might be connected to the murder in Mt. Ranier. An inspection of the van turned up three key pieces of evidence: a Bernadelli 9mm handgun, a part to an SKS assault rifle (which uses 7.62mm bullets), and a handprint.

The handprint in the stolen van, according to police, was that of William Knight, who had been arrested in Maryland on several earlier occasions on charges ranging from carjacking to assault. Police obtained a search warrant for Knight’s residence on Kennedy St., NE. Officials say — in that house — they discovered an SKS assault rifle. Police further say a ballistics test shows that gun was used to shoot the bullet (or bullets) that killed Alonzo Guyton.