By Louise Boyle for MailOnline The sister of Charles Manson murder victim Sharon Tate has described her elder sibling's killers as 'little creeps, nothing special' as she pledged to fight for the rest of her life to make sure they remain behind bars. Debra Tate was just 16 when her sister Sharon, the actress wife of Roman Polanski, who was eight and a half months pregnant, was slaughtered by Manson and his 'family' on August 8, 1969. Three of Tate's friends - Jay Sebring, Abigail Folger and Wojciech Frykowski - were also brutally stabbed to death at her Beverly Hills home while the murderers wrote 'DEATH TO PIGS' in their victims' blood on the walls in the hope of starting a race war that Manson named 'Helter Skelter'.
@highlight
Debra Tate was just 16 when her sister Sharon, the actress wife of Roman Polanski was slaughtered by Manson and his 'family' in 1969
@highlight
Three of Tate's friends - Jay Sebring, Abigail Folger and Wojciech Frykowski - were also brutally stabbed to death at her Beverly Hills home
@highlight
The Manson family wrote 'DEATH TO PIGS' on walls in their victims' blood during the murders which became some of the most notorious in history
@highlight
Debra Tate, now 61, said in a recent People interview that the killers 'were not supernatural... they're nothing special, they're just little creeps'
Earlier this month, one of the women who killed for @placeholder has given her first on-camera interview about why she felt compelled to murder innocent people.