Day 22

The inquest heard that shoot-out victim constable Tsui Po-ko had probably suffered from schizotypal personality disorder, having seven out of the nine symptoms. It also was said Tsui resorted to committing criminal behaviour to satisfy his thirst for excitement, which he found absent from his police career.

The Testimony

FBI official James McNamara analyses Tsui's personality and based his assessment on the police interview statements taken from the constable's colleagues and friends. He said Tsui did not want to - and did not feel the need to - establish relationships with people.

His sole source of success seemed to have come from his promotion in career, he said.

'He was frustrated when the senior officers asked him to work more on crime prevention instead of giving out fine tickets.'

It was said Tsui liked seeking excitement and it was acted out by allegedly ambushing the police officers, robbing a bank in broad daylight and executing a bank security guard.

'The excitement which was absent in his position as a police constable may have been found in his carrying out of the criminal acts.'