MANITOWOC, WI (WHBL) - Former Manitowoc high school basketball star Robert Sullivan was freed from jail Tuesday after he was arrested for the shooting death of his brother on Sunday. His attorney said the 65-year-old Sullivan was acting in self-defense when his 62-year-old brother Carey Sullivan was killed at the home they shared in Manitowoc. A bond hearing set for Tuesday was cancelled, as an investigation continues. Defense lawyer Brian Maloney said the victim had a history of mental illness and making threats – and Carey was attacking Robert when the shooting occurred. Maloney said the shooting victim outweighed his client by over 100 pounds. The district attorney’s office said police are still checking out various aspects of the case – including the claim of self-defense, and Carey Sullivan’s mental history. The D-A said there’s no indication that Robert Sullivan had any history of violent or aggressive behavior. A preliminary autopsy shows that Carey was shot once in the head at close range. Robert Sullivan was an all-state high school basketball player for two years at Manitowoc, before starting at the University of Michigan for three years.