He knew their drummer Dennis Wilson.
You can read about it here ....
The following is an excerpt from the book "Helter Skelter" written by
Vincent Bugliosi, prosecutor of the Tate-La Bianca Trials.
This is his recollection of his interview with Dennis Wilson.
I had less success with Dennis Wilson, singer and drummer for the Beach Boys. Though Wilson initially claimed to know nothing of importance, he finally agreed to "level" with me, but he refused to testify.
It was obvious that Wilson was scared, and not without good reason, On Deceraber 4, 1969, three days after LAPD announced they had broken the case, Wilson had received an anonymous death threat. It was, I learned, not the only such threat, and the others were not anonymous.
Though denying any knowledge of the Family
