SOUTH PHILADELPHIA (WPVI) -- Police are looking for the man who knocked out a woman who was walking home from the gym in South Philadelphia.The attack happened at 8:40 p.m. on Wednesday, April 15th on the 700 block of Montrose near South 8th Street.Investigators say a witness heard a loud thump and looked outside.Police say the suspect was seen holding the victim, who was unconscious. Investigators say the man punched the woman right in the face.When the witness asked what was happening, the suspect allegedly put the victim on the ground and fled the scene."It seems that after the incident, he went through her pockets and he assisted her to some stairs nearby before he left the scene," said Capt. Martin Derbyshire of the Philadelphia Police.The suspect is described as a black male, 20 years old, 5'7" tall, medium build, wearing a hooded sweatshirt, black jacket, black pants, and a white skull cap.Police say the suspect had a unique design on the back of his jacket hood and the laces of his sneakers."They're bright red or orange laces in his sneakers and a unique design on the back of the hood of his jacket that appears to be camouflage," said Derbyshire.The victim suffered a fractured jaw, a broken tooth and remembers little about the assault."It seems that she didn't even know he was there," Derbyshire said.If you have any information about this crime or this suspect, please contact: South Detective Division 215-686-3013/3014.