An 18-year-old man suspected of fatally stabbing 15-year-old Cabrillo High School student Keyshawn Brooks last month pleaded not guilty at an arraignment hearing Monday morning, according to the Los Angeles County District Attorney’s Office (LADA).

Giovanny Montelongo, who is being charged with capital murder and robbery, pleaded not guilty to all charges, said LADA spokesperson Greg Risling.

Preliminary information found that Keyshawn was stabbed at about 3:25PM on March 12 while he was walking home from school on the 2800 block of Santa Fe Avenue. Police say the suspect, later identified as Montelongo, was trying to steal Keyshawn’s backpack.

Police were able to arrest Montelongo within an hour of the stabbing, said LBPD Chief Robert Luna at a press conference regarding the stabbing that same day.

Montelongo is scheduled to return to court on July 7 for a pre-hearing conference.

He is being held without bail.

No further information is available. We will update this story as we learn more.