No, Manson did not kill a black panther.
It was a guy named Crowe, who Charlie thought was a BP, and Charlie only wounded the guy, but did not kill him with, I believe he shot Crowe with a .25, but did not kill him.
I’ll read Helter Skelter again. Last time was in 1978 when I was in high school. But I believe you’re wrong.
Manson did kill the black panther according to a witness and I remember reading that Manson also drove around in a dune buggy with a sword and used that sword to kill someone else. Another death attributed to Manson was of the hired hand at Spahn ranch, I think the guys name was Shorty. He was a witness to the Family’s evil and was going to serve as a witness so Manson killed him. It was his body that is supposed to be buried in 7 different graves because Manson cut him up with his sword.
Like I said, I read the book decades back, but I do remember a witness telling the DA that Manson did kill.