Charleston Police are asking for help finding a son and his mother in connection with a fatal stabbing outside of a motel early Saturday morning.

Christopher Tray Spriggs, 17, of Summerville is one of three suspects charged with murder. His mother, 34-year-old Shelly Diane Greene, is wanted on a charge of accessory to murder.

A wanted poster issued by police says Spriggs and Greene might be traveling together in an orange 2007 Chevy Aveo with a Florida license tag S507UA.

Police have made two arrests in the case so far. Steven Andrew Turnage, 18, of Summerville, turned himself in to police late Sunday, public information officer Charles Francis said.

A fourth suspect, Tyler Kent, 19, of Summerville, was arrested Saturday on a charge of murder. He is being held without bond.

All three men are charged with stabbing to death Kindu Bost, 30, of Kansas. Authorities said Bost has family in the area.

Francis declined to release details about what might have fueled the stabbing. A police report said Bost was stabbed twice in the left side in the parking lot of the Best Western at 1540 Savannah Highway.

Bost took a taxi to the motel from a North Charleston restaurant around 2:45 a.m., the driver told police. Bost told the driver he didn't have cab fare and instructed the driver to take him to the rear of the motel.

Bost told the driver to stop, then got out and ran toward a gray, four-door sedan, police said. The cab driver said he saw a man get out of the gray car and run toward Bost, and the men began fistfighting.

Two other men got out of the gray car and joined the fight, the driver said.

The men left in the gray car when another witness asked what they were doing, police said. Bost got into a nearby orange or reddish-colored car occupied by a woman, a report said, but when police arrived they found him lying face-down in a grassy area of the parking lot.