The man, who allegedly gunned down six Muslims during prayers at a Quebec City mosque in January, made a brief appearance in a Canadian court Friday under heavy security.
The prosecution divulged additional evidence to the defense team of Alexandre Bissonnette, a necessary disclosure step under Canadian criminal law.
Bissonnette, 27, is accused of the murder of six men at the Islamic Culture Centre of Quebec City and wounding 19 others, Jan. 29. He faces six charges of murder and five of attempted murder.
Canadian media said the accused looked "haggard" while watching proceedings.
Crown prosecutor Thomas Jacques said more evidence will be disclosed at a future date.
The next court date is Oct. 2.