CONCORD, N.H., Jun. 6 — When Voytek Frykowski staggered bloody and dying onto the front lawn of the home of actress Sharon Tate, a horror-struck, 20-year-old girl told him, “Oh God, I’m so sorry.”

Four months Later, in December 1969, Linda Kasabian of Milford surrendered to New Hampshire state police. She was one of several members of a cult founded by Charles Manson wanted in connection with the murders of Frykowski, Miss Tate and five others.

She was granted immunity from prosecution in return for her testimony and became the state’s star witness in the trials of Manson, Susan Atkins, Patricia Krenwinkel and Charles “Tex” Watson. The four were convicted of murdering Miss Tate, Frykowski, hair stylist Jay Sebririg, coffee heiress Abigail Felger and Steven Parent on Aug. 9, 1969.

Her testimony also helped convict Leslie Van Houten, who joined the group the next night to murder Los Angeles merchant Leno LaBianca and his wife Rosemary. On orders from Manson, Linda Kasabian accompanied the killers to both murder scenes. But she did not participate in the killings, the main reason she was granted immunity.

“From the first interview I believed her story, and I felt that a jury would also,” chief prosecutor Vincent Bugliosi wrote in “Helter Skelter,” an account of the killings and the trial. “There were no pauses in her answers, no evasions, no attempts to make herself appear something she was not. When a witness takes the stand and tells the truth, even though it is injurious to his own image, you know he can’t be impeached.”

She returned to New Hampshire, remarried and as Mrs. Linda Christian, lived a secluded life in the Milford area, where as late as April reliable sources said she was drawing welfare.

She managed to avoid reporters until April 19, when she was arrested with 10 others on charges of rioting.