A psychiatrist who interviewed Robert Walter Bonnetrouge, and reviewed 1,500 pages of psychiatric and correction reports on him, said the repeat sex offender has severe mental handicaps that have prevented him from benefiting from sex offender programming he has had while in jail.

Bonnetrouge, 34, is the subject of a dangerous offender hearing in Yellowknife.

Dr. Marc Nesca told the courtroom Bonnetrouge was diagnosed as cognitively impaired as far back as his first offence, which occurred when he was in his teens.

In testing done on him in jail 13 years ago, Bonnetrouge scored in the first percentile for short-term memory, meaning 99 per cent of the population has better short-term memory.

Nesca said he tried to administer a question and answer test written at the Grade 4 level but Bonnetrouge couldn't grasp some of the concepts in it, grew frustrated and gave up.

Nesca said Bonnetrouge didn't have the intellectual capacity to benefit from sex offender programming he got while in jail. He also said Bonnetrouge is very impulsive.

Earlier in the hearing, a psychiatrist called by the prosecutor said, in his opinion, Bonnetrouge has the ability to learn and said the fact that he didn't learn made future programming pointless.

The same psychiatrist, Dr. Scott Woodside, said Bonnetrouge scored the highest he's ever seen on a test designed to measure sex offenders’ likelihood to re-offend.

Nesca said research has shown that while that test is good for predicting the behavior of groups of people, it's almost useless when it comes to predicting individual behavior.

The hearing continues Thursday.