NORTH CHARLESTON, S.C. (WCBD) – US Marshals made two additional arrests in connection to a North Charleston murder that happened last weekend. North Charleston police officers responded to Wales Court, which is not far from Dorchester Road, Sunday night about several calls from people saying they heard gunshots in the area. When police arrived, they found 18-year-old Timothy Haynes’ mother attempting CPR in the driveway near the front door of a residence.  RELATED: North Charleston police investigate Wales Court homicide First responders took over life-saving measures, but Haynes did not survive. Frank Simmons, 21, and Christopher Simmons, 20, were both apprehended on W. Robinhood Drive Thursday and charged with murder. Both men were transported to the Al Cannon Detention Center. On Monday night, North Charleston detectives arrested 22-year-old Camryn Brown for murder.