Denver District Attorney Mitch Morrissey has charged 36-year-old Carmen Tisch with criminal mischief after she was accused of scratching, punching and leaning against a painting valued at more than $30 million on Dec. 29. She appeared in court Friday morning to be advised of the charges. Her bond was lowered from $20,000 to $5,000.
Tisch's mother, Mary Thompson, says her daughter is an alcoholic.
"My daughter has been addicted to alcohol for a long time," Thompson said. "We have been trying to get her help."
Officials say it will cost about $10,000 to restore the painting. Still is credited with pioneering the abstract expressionism movement.
"This is not something she would do," Thompson said. "We just love her so much."
The Clyfford Still Museum, which is dedicated to Still's work, opened in November.
(KUSA-TV © 2012 Multimedia Holdings Corporation with The Associated Press)