I doubt the murders happened in that lane from the evidence and all the reports reffering to no ice on the car etc it sounds like they were murdered elsewhere, placed in the landrover, and left there.

Also there would be alot more blood on the backseat than there is on those pics, the whole car would be splattered, if youve seen pulpfiction where he shoots the kid in the head with a 9mm, well shotgun cartridges consist of shot, which is kinda little ball bearings, these disperse in the air and on impact and would have mushed their whole faces. In PF blood splatters the whole car which is what happens due to the displacement of a big chunk of steel @ faster than the speed of sound, let alone 50-100 "bearings".