Her father hid the murder weapon for OJ. There is not doubt in mind my mind.
The “celebrity” status of his family was the pay-off. It seems that way to me.
Her father took OJ the the airport, There was a dark Hefty trash bag in the car with the knife and bloody clothes. They put the bag in the trash can at the curb.
The murder weapon was tossed into the ballona creek by o.j. himself on the ride to the airport Robert got rid of the bloody clothes and towels