LOS ANGELES -- Former Charles Manson disciple Leslie Van Houten was denied parole Thursday for the 18th time for the 1969 murders of a Los Feliz couple.

A parole board panel meeting at the California Institute for Women in Frontera gave Van Houten a two-year denial and set her next hearing for 2009.

She was most recently denied parole in September 2006.

Van Houten was convicted of murder and conspiracy for participating with fellow Mason family members Charles "Tex" Watson and Patricia Krenwinkel in the Aug. 9, 1969, slayings of grocers Leno and Rosemary La Bianca at their Los Feliz home.

Van Houten was sentenced to death, but that was later changed to life in prison with the possibility of parole, after the U.S. Supreme Court ruled in 1972 that the death penalty was unconstitutional.

She acknowledged her role in the La Bianca murders at an August 2004 parole hearing, when she said that she stabbed Rosemary La Bianca 14 to 16 times after the woman had already been stabbed by Watson and Krenwinkel.

At earlier hearings, Van Houten said she believed La Bianca was already dead at the time, and said it was "very hard" for a woman now in her 50s to "look back on the behavior of who I was at 19."