PHOENIX -- A Peoria teenager has been arrested in connection with her father's murder.Alysa Gibson, 17, was arrested on Tuesday and is being charged as an adult. She faces charges of first-degree murder, conspiracy and hindering prosecution.Steven Gibson Sr., 39, was found dead in his garage on March 1. His wife and son are accused of plotting the murder and enlisting other teens to help. Both were arrested at the end of March. According to Peoria police, Michelle Gibson, 41, had alleged domestic violence and was afraid her husband would kill her. Investigators said Erik McBee, 16, hit Gibson Sr. with a bat and cut his throat with a knife. He was arrested and pleaded not guilty last month.Steven Gibson Jr., 15, is accused of stabbing his father in the chest at least three times. He and his mother pleaded not guilty in the case.