A Black River man is dead after an apparent drowning in the Town of Theresa Thursday afternoon. State Police say 30 year old Daurice Mapp was with friends at Sixberry Lake just after 3 pm when he jumped off a cliff into the low water. Those friends say he surfaced and appeared to immediately struggle with staying afloat. They were unable to pull him ashore and he went under a final time and did not resurface. The NYSP Dive Team responded to the scene and recovered the victim?s body in 24 feet of water. An autopsy is scheduled to determine the exact cause of death. The investigation into the incident is continuing.