One month after the murders, Polanski, along with other contributors such as Peter Sellers, Yul Brynner and Warren Beatty, put an ad in the LA area newspapers for a reward:

REWARD

$25,0000

Roman Polanski and friends of the Polanski family offer to pay a $25,000 reward to the person or persons who furnish information leading to the arrest and conviction of the murderer or murderers of Sharon Tate, her unborn child, and the other four victims.
  

It seemed like it was open season on