It's too bad the time when Savannah searched for the location of Charlie Chan drive wasn't given. That would maybe tell us if the murders occurred at the residence or else where. It's open to interpretation whether or not CP might have driven the KIA himself to the Charlie Chan Dr residence at 23:50 after the murder occured and within four minutes of arriving the vehicle was then leaving to the Danny Kaye location to dump the car at 23:24.
IMO, four minutes just doesn't seem like enough time for CP to have met up with MG and SS, discuss a drug deal which turns bad, killed them both, get MG into the back seat, then get his dad and likely the two of them figure out what to do and where to dump the bodies and car and then the the two of them leave to dump the car arriving a few minutes later when seen on video at 23:59 at Danny Kaye.
I'm leaning toward killed elsewhere and CP either showed up in the KIA to the Charlie Chan location to get dad. Maybe there was a phone call between CP and RP in that time prior to arriving at the residence on Charlie Chan to speed things along.
JMO