

The fugitive ex-policeman Christopher Dorner, suspected of killing three people and injuring two, had a history of making complaints against fellow officers within the Los Angeles Police Department, and one officer said he had a reputation as a "hot head," according to internal affairs records.

Dorner was accused of punching a recruit in the chest while he was in the Police Academy in 2006. That recruit, Abraham Schefres, was wearing a bulletproof vest and a trauma plate, when Dorner allegedly punched him. After being hit, he glared at Dorner, whom Schefres said responded as though he had made a mistake, records show. Schefres said he believed that Dorner had not been trying to hurt him but that the punch was "more of a 'hello'" and to appear tough.

Schefres told an investigator that he "believed this was part of Dorner’s persona," records show. Schefres described Dorner as "a hot head" who would walk up to fellow recruits and "get in their faces in an aggressive" but joking way.

TIMELINE: Manhunt for ex-LAPD officer

Dorner, 33, is wanted in connection with a double homicide in Irvine on Sunday and the shooting of three police officers, one fatally, in Riverside County on Thursday.

Authorities described him as armed and extremely dangerous, and alerts about him were issued across California and Nevada as federal, state and local authorities intensified their search.

Police say Dorner embarked on a campaign of deadly violence to exact revenge on those he blamed for his firing.

DOCUMENT: Read the manifesto

In 2006, Schefres was interviewed about the punching incident during an investigation into allegations that Dorner slapped the hand of another recruit officer, internal affairs records show. Dorner had accused that second recruit--as well as another recruit -- of using a racial slur while they were traveling in a police vehicle during their time in the academy.

The department confirmed Dorner’s slur allegation against one of the recruits but not the other, the records said. The agency concluded that Dorner's punch of Schefres did not rise to the level of misconduct.

By then, Dorner was serving a military deployment overseas for the Navy. He returned to the LAPD in the summer of 2007, and in August accused his training officer, Teresa Evans, of kicking a mentally ill man during an arrest in San Pedro.

FULL COVERAGE: Sweeping manhunt for ex-cop

Two months later, Dorner lodged another complaint against fellow cops, according to an LAPD complaint review report. Dorner said that after work on Oct. 10, 2007, he discovered that his jacket, on top of his duty bag, "was wet and dirty," according to the report.

He believed someone had urinated on it. Dorner testified at a disciplinary hearing that he believed that he had been singled out in retaliation for his complaint against Evans.