The Golden Globe winner is taking the stand largely on behalf of his older brother, Eamon. Last week, Colin spoke at an event for BeLonG To, an Irish LGBT organization aimed at teens, about some of his sibling's struggles.
"I can't remember much about the years of physical and emotional abuse my brother, Eamon, suffered," he said. "The thing I do remember though, quite literally, is blood on his school shirt when he came home in the afternoon. The beatings and taunting were very frequent for him and a constant part of his school years."