They were arrested and sent to jail, but Baader escaped. He was caught in April 1970, but in May 1970, he was allowed to go a library outside the prison. Journalist Ulrike Meinhof and two other women were allowed to join him. They let a masked man into the library who fired shots at a 64-year-old librarian. Baader, the three women and the masked man fled through a window, and the group soon became known as the "Baader-Meinhof Gang".