Pool / Getty Images The sister of Idaho killer Bryan Kohberger has made her first public statement about her brother months after the convicted murderer was sentenced to life in prison. Mel Kohberger told the New York Times that she thought she was being pranked after finding out her brother had been arrested for the slaying of four University of Idaho students. When news broke of the killings, she had reached out to Bryan to warn him about a “psycho killer” on the loose near his home. “Bryan, you are running outside and this psycho killer is on the loose,” Mel said she told her brother. “Be careful.” Read more at The Daily Beast.