Reasonable Doubts? Alan M. Dershowitz's book Reasonable Doubt, explores facts that may reveal possible reasons why O.J. Simpson was acquitted for the murders of Nicole Brown and Ron Goldman. Dershowitz asserts that the Los Angeles Police Department (L.A.P.D.) intentionally tampered with evidence and unsuccessfully covered up their involvement with evidence tampering for their own ambitious effort to aid in convicting O.J. Simpson. Furthermore, Dershowitz suggests that the jury acquitted O.J. Simpson because the prosecution's "star" witnesses Officers Furhman and Vannatter were caught in a web of lies that further questioned their validity as ethical officers which weakened