Complex sentence: "I'll kill the first man that bothers me," Panzram told the warden; on June 20,1929 he killed Robert Warnke, foreman of the prison laundry in Leavenworth, battering him to death with an iron bar.
Split into simpler sentences: I'll kill the first man that bothers me, Panzram told the warden. Then on June 20,1929 he killed Robert Warnke, foreman of the prison laundry in Leavenworth, by battering him to death with an iron bar.