CALGARY -- A psychiatric assessment for a man accused of fatally stabbing five young people in Calgary's worst mass murder is expected to be released today.

Matthew de Grood, 23, has already been found fit to stand trial, but the Crown wanted a mental review to determine if he could be found criminally responsible if convicted.

De Grood, who had been assessed in Edmonton, has been transferred to the southern Alberta psychiatric unit.

He is expected to appear via closed-circuit TV.

De Grood was charged in mid-April with first-degree murder in the stabbings at a party near the University of Calgary to mark the end of the school year.

A preliminary hearing has already been scheduled to begin March 2. No matter what the psychiatrist's report says, the hearing will go ahead unless the defence decides to waive its right to it.

De Grood, the son of a senior Calgary police officer, has been in psychiatric care since his arrest.

Police have not said what they think motivated the attack, but say de Grood was invited to the party and mingled with guests before violence broke out.

Zackariah Rathwell, 21; Lawrence Hong, 27; Joshua Hunter, 23; Jordan Segura, 22; and Kaiti Perras, 23, were slain.