WASHINGTON D.C.– A D.C. Superior Court jury found a 28 year-old District man guilty Sept. 14 of first-degree murder and other gun and assault charges in a shooting two years ago near a playground that left one man dead and two others wounded.

The verdict marked the third time in a week in which a D.C. jury delivered guilty verdicts in cases in which a shooting victim was hunted down and killed.

“These guilty verdicts demonstrate our citizens’ refusal to tolerate the deadly gunplay that still plagues too many of our neighborhoods,” U.S. Attorney Ronald Machen said in a news release.

The jury found that on July 9, 2010, Donnell Washington snuck up on the victim, Stanley Dawson, Jr., 19, and three of his friends, as they socialized near a playground in the Parklands section of Southeast Washington.

Prosecutors said the violence stemmed from a Fourth of July dispute linked to an associate of the defendant firing a gun near a playground in the 3500 block of 19th Street SE. Dawson apparently disarmed Washington’s best friend, according to police. Several days later, prosecutors said, Washington opened fire as the young men socialized near the same playground.

Two shots struck Dawson in his head and back, ultimately killing him. Two bullets struck another victim in the forearm and backside, requiring surgery. A third victim sustained graze wounds to his nose and foot. The fourth victim escaped with no physical injuries, according to the U.S. attorney.

Washington faces a mandatory sentence of 30 years in prison on the murder charge.

In earlier court action, a jury convicted Eric Foreman, 18, and Charles Coates, 43, both of D.C., in unrelated cases.

Foreman was convicted on Sept. 10 of first-degree premeditated murder while armed and other charges in the August 2010 slaying of Neil Godleski, 31. Coates was convicted on Sept. 12 of second-degree murder while armed and other charges in the February 2011 slaying of Eddie Leonard, Jr., 32.