Okay. Assuming nothing let's lay it out.
OJ comes home from the dance recital
OJ calls a chick
OJ takes Kato to McD to get some food
OJ and Kato get back from McD about 9:30
OJ packs his shyt for Chicago
OJ changes into his murder gear and gathers his murder tools
OJ drives over there and hacks up Ron and Nicole (10:15)
OJ disposes of his blood soaked clothes
or:
OJ drives home covered in blood
OJ manages not to get any blood in the Bronco other than what was found in the Bronco
OJ manages to no drop any blood anywhere on his way into the house or throughout the house (save for the blood found by LAPD)
OJ cleans himself completely of all blood, hair, skin, and human tissue
OJ also completely cleaned the room where he cleaned himself (blood leaves stains)
OJ puts on a fresh set of clothes and heads out to meet the driver
OJ does all of this without being seen by anyone
Am I missing anything?