AN investigator in the murder case of Constable Rushon Hamilton was yesterday forced to defend the integrity of his probe into the killing of 14-year-old Jhaneel Goulbourne, following suggestions by the defence that he was biased in his handling of the matter due to his dislike for the accused policeman.

The suggestion was made by attorney Valerie Neita-Robertson who had spent significant time cross-examining Superintendent Alden Davis about what she suggested was a bad relationship between himself and Hamilton's father, which, she posited, led to his dislike for the accused.

Hamilton's father was also a policeman stationed in St Mary.

"I'm suggesting that your investigation was biased because of your dislike for Mr Hamilton," said Neita-Robertson during the trial in the Home Circuit Court.

"No, ma'am," Davis responded.

Davis also denied that he was removed from the case as investigator because of his alleged bias against Hamilton.

The lawyer suggested that the root of Davis' dislike for Hamilton stemmed from an incident at the Islington Police Station in St Mary, many years ago, when a friend of Davis was shot.

However, Davis denied this, saying he knew of no such incident.

The policeman also denied a suggestion that Hamilton asked to be transferred from the Elletson Road Police Station in East Kingston because he (Davis) constantly harassed him.

He also denied suggestions that he told another senior policeman that he didn't like Hamilton.

Neita-Robertson also tried to suggest further bias by saying that another police officer was questioned by Davis but released without even being put on an identification parade.

That police constable, Davis testified, was picked up due to a statement given by Goulbourne in relation to a complaint that led to Hamilton being charged with carnal abuse.

But during re-examination by the prosecution, the superintendent said that there was no evidence to hold the police constable in question culpable.

Hamilton is being tried on allegations that he kidnapped and murdered Goulbourne in October 2008.

The case continues today.