As I said, they didn't make the connection between the suspects they arrested and Manson at that time. The connection wasn't discovered until years later. The suspects, Frykowski, Sebring, and Manson were all dealing for the same criminal organization, which was later broken up and investigated by the Senate Judiciary Committee.
ive studied this crime for over 35 years..thats the craziest story ive ever heard about the Tate, La Bianca murders....geez.