No question about it Apple. At first all Bugliosi really had was mostly circumstantial. However, once Kasabian agreed to testify, her testimony wound up corroborating that circumstantial evidence.

Tex Watson and Patricia Krenwinkel's fingerprints were found at the scene. And while this evidence, by itself, could be considered circumstantial, Kasabian's testimony putting them there corroborated the fingerprint evidence because it was totally independent of the physical fingerprint evidence.

Her testifying that they were there corroborted (supported) that physical evidence.

As I've said in a previous post, Bugliosi and his team were brilliant in how they pieced the evidence and that case together using the testimony of one person to support what was mostly circumstantial evidence.

Bugliosi was able to convince a jury to convict a man of murder who physically did not partake in those murders. He was able to convince a jury that Manson was as guilty, if not more guilty, than those who physically committed those murders.

And let's keep in mind that this was back in 1969 when the most powerful weapon that law enforcement had was the aability to lift a fingerprint.

A brilliant prosecutor.