PHILADELPHIA (WPVI) -- Philadelphia police are investigating a disturbing find in Rittenhouse Square.Action News is told someone found a body in the park along the 200 block of South 18th Street around 4 a.m. Friday.Officers found drug paraphernalia near the body of a homeless man believed to be 50 years old.They do not suspect foul play.Forensic investigators are working to determine exactly how the man died.------