MONTREAL -- A Crown witness says evidence presented at Luka Rocco Magnotta's murder trial suggests his actions after Jun Lin's slaying in May 2012 were highly organized.

Dr. Gilles Chamberland says that is inconsistent for someone suffering from schizophrenia.

He testified today that Magnotta, over a 48-hour span, dismembered and disposed of Lin's body, emptied his apartment and prepared for a trip to Europe.

The psychiatrist says schizophrenics are typically very disorganized, while he described the accused as "ultra-organized."

Magnotta is charged with first-degree murder in Lin's slaying and has pleaded not guilty by way of mental disorder.

Defence psychiatrists have testified they believe Magnotta was psychotic, had been untreated for schizophrenia for at least two years and was unable to tell right from wrong the night Lin was killed.

Chamberland, a Crown rebuttal witness, believes Magnotta was aware of what he was doing and that it's more likely he suffers from a personality disorder.

He noted that a German prison psychiatrist who diagnosed Magnotta in June 2012 as being in a psychotic state was given information by the accused to ensure such a diagnosis.

Magnotta faces four other charges: criminally harassing Prime Minister Stephen Harper and other members of Parliament; mailing obscene and indecent material; committing an indignity to a body; and publishing obscene materials.