During his more than four decades behind bars, convicted murderer Charles Manson — the mastermind behind a gory 1969 Los Angeles killing rampage — has been an unrepentant and incorrigible inmate, repeatedly cited for behavioral problems including hiding cellphones and a hacksaw in his cell.

State corrections officials say Manson, now 82, has incurred more than 100 rules violations since 1971, when he and other members of his so-called family were convicted of killing pregnant actress Sharon Tate and six other people during a bloody rampage in the Los Angeles area during two August nights in 1969.

Over the years, he has been cited for assault, repeated possession of a weapon, threatening staff, and possessing a cellphone, Terry Thornton, a spokeswoman for the California Department of Corrections and Rehabilitation, said in an email Wednesday.

“Suffice it to say that he cannot be described as a model prisoner,” she said.

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