Robert Bales, a sargent in the U.S Army convicted of murdering 16 Afghans in 2012, had some erratic and violent behavior before the incident, according a report by U.S. Central Command released to the public on Tuesday. Bales allegedly punched an Afghan truck driver just a month before he shot 22 people in 2012. Bales also was allegedly using steroids which reportedly made another soldier wary of his behavior. The Pentagon report said the behavior “did not rise to the level of warnings or indicators” that he would murder civilians.