SACRAMENTO, Calif. — Patricia Krenwinkel, once a devout follower of cult killer Charles Manson and now the longest-serving female inmate in California, appeared again Thursday before a parole board – 47 years after she helped kill pregnant actress Sharon Tate and six other people.

Krenwinkel, 69, has been denied parole 13 times since her conviction in the 1969 killings.

She acknowledged during her trial that she chased down and stabbed Abigail Ann Folger, the heiress of a coffee fortune, at Tate’s home and helped kill grocer Leno LaBianca and his wife, Rosemary, the next night.

Los Angeles County prosecutors say Krenwinkel carved the word “war” into Leno LaBianca’s stomach, then wrote “Helter Skelter” in blood on the couple’s refrigerator.

Krenwinkel’s attorney, Keith Wattley, petitioned the state to hold the hearing a year early at the California Institution for Women, where Krenwinkel is imprisoned.

Krenwinkel contended at her previous parole hearing in 2011 that she is a changed woman. She has a clean disciplinary record, earned a bachelor’s degree behind bars, taught illiterate inmates to read and trained service dogs for disabled people.

Sharon Tate’s sister, Debra Tate, said before Thursday’s hearing that killers such as Krenwinkel cannot be rehabilitated.