An Albuquerque SWAT sergeant says police were aware that a homeless man suffered from paranoid schizophrenia and had previously attacked an officer before he was fatally shot during a standoff.

Sgt. James Fox said Monday that officers who arrived to the scene knew basic information about James Boyd when police received reports about the 38-year-old camping illegally in the foothills of the Sandia Mountains.

Fox made his comments during a preliminary hearing for Officer Dominique Perez and former Detective Keith Sandy, who are facing murder charges for Boyd's death.

A judge is listening to testimony this week and will decide if the officers should stand trial.

Fox says police determined the standoff was a SWAT situation because the knife-wielding Boyd was on higher ground and put officers in danger.