DEKALB COUNTY – (WAOK/AJC)  - DeKalb police say one suspect wanted for a double homicide earlier this week is now in custody.   Police arrested 20-year old Anthony Lewis for the shootings,  that occurred in Gresham Park,  near the pool on Monday.   Investigators say it appears the victims,   Stanley Hill and Kelvin Parks argued with several people,  before the shooting started.    A former Atlanta investigator said he tried to administer CPR to one of the victims,  right after the shootings took place.   The pool wasn’t open on Monday,  but there were people in the park.   Police say they are seeking a second suspect in the crime.