[nickcarraway]

Edmund Kemper is 6’5’’ and imposing.

[Spacetrucker]

He is also one of the most intelligent (per I.Q.) people you would NEVER want to meet.

[Michael.SF.]

Had to look Kemper up, as I did not recall the name. Wikipedia puts him at 6'9", either way, very imposing.

Sounds like the two of them crossed paths at Vacaville, before Charlie went to Corcoran.