By Steve Helling and Julie Mazziotta
Updated June 11, 2016 at 05:44 PM EDT
Credit: Christina Grimmie/Instagram

The shooter who fatally shot Christina Grimmie was possibly a deranged fan, according to Orlando police.

“That would be speculation, but that’s what it’s looking like,” said Orlando police chief John Mina, in a press conference Saturday morning.

Grimmie, a 22-year-old alum of The Voice, was shot and killed after her concert at the city’s Plaza Live venue late Friday night.

Police say that the killer was a 21-year-old white male who had traveled to Orlando from elsewhere in Florida with two handguns and a hunting knife to commit the crime. After shooting Grimmie, her brother Marcus (aka, Mark) tackled the suspect to the ground, and the suspect then killed himself. Police intend to release his name “in a few hours.”

At this point, police are unsure of why the suspect shot Christina, but believe he came specifically to kill her.

“There’s no indication that he knew her, we’re looking into that to try and find a motive for the crime,” Mina said.

Mina said police are combing through the suspect’s phone and computer for more information.

Mina also praised Marcus for “almost immediately” tackling the suspect to the ground.

“Very heroic actions by Marcus to jump in, and definitely could have prevented further loss of life,” Mina said.

He added that there were no extra police or off duty police officers at the venue, just unarmed security guards.

Grimmie competed on season six of The Voice, as a member of Adam Levine’s team. The Marlton, New Jersey, native ultimately came in third.