On November 15, 1993, Knorr was charged with two counts of murder, two counts of conspiracy to commit murder, and two special circumstances charges: multiple murder and murder by torture. Knorr initially pled not guilty but then made a deal with the prosecution after learning that her son Robert, Jr. agreed to testify against her in exchange for a reduced sentence. She pleaded guilty on the condition that she be spared the death penalty. On October 17, 1995, Knorr was sentenced to two consecutive life sentences. She is incarcerated at California Institution for Women in Chino, California. She will be eligible for parole in 2027.