http://www.businessinsider.com/oj-simpson-murders-and-jason-simpson-2014-6?op=1

To me it is far more plausible his son Jason is the killer

The murders took place between 9:45 and 10:05 p.m. Jason was by himself after approximately 9:50 p.m. and "has no alibi that can be supported by anyone else as to where he was while the killings occurred."

Jason's time card for the night of the murders was handwritten, even though the electronic time clock was working.

In his past, Jason had nearly killed a girlfriend (with a knife) and almost seriously injured another in fits of rage (whereas O.J. has been accused of domestic abuse, but he has never been arrested for assault and was not prone to use weapons to settle a dispute).

At the time of the murders, 24-year-old Jason was on probation for assault with a deadly weapon for attacking his boss with a kitchen knife.

...Jason was trained in hand-to-hand combat as well as field knife training while attending the Army and Navy Academy, whereas O.J. hates the sight of blood.

The LAPD found 15 separate unidentified fingerprints at the crime scene. None belonged to O.J., and police never compared Jason's fingerprints)