. >> he was completely unconscio unconscious. he was put in the back of a rescue squad.edic worked on him. they worked on him for long time but tragically he was pronounced dead. >> reporter: 15 year old lived at the few blocks away. despite signs warning people to stay out this remains a popular place for kids to cool off. but police say the seemingly tranquil surface hides hidden dangers. muddy waters conceal rocks, tree branches even shopping carts underwater. >> i grew up about two blocks away, i think i can actually see the house where i grew up, and this was nutter yous back here for bad spot to swim rt. >> so it's tollly different than swimming pool where the water is calm you can see the bottom. and swimming pool there's often lifeguards on locations. >> reporter: detectives here enter viewed the three other surviving teens who tried to help and at this point it this appears to have been an accidental drowning. reporting live tonight from northeast detectives todd quinones cbs-3 "eyewitness new news". >> such a sad story, todd, thank you. >>> in ocean city, the c