2/24/12 – A Horicon teen accused of attacking a woman in her home last year has changed his plea. Cory Frederiksen’s attorney changed his plea to not guilty earlier this week. He originally entered a not guilty plea by reason of mental defect. It’s not clear why the plea was changed. Frederiksen is charged with First Degree Attempted Murder for allegedly stabbing his 53-year-old neighbor as many as 18-times. Authorities say Candia Rehse went to get something to eat just before 5am and, when she returned home, she walked in on Frederickson. Rehse was left with a fractured skull and deep skin lacerations, among other injuries. Frederickson is currently serving a 13-year sentence for an unrelated crime.