Monika (who asked the Deseret Morning News not to use her last name) was introduced to Talovic over the phone. Their lengthy conversations grew into a sort-of "relationship." She spoke to him the night before the shooting, when he told her she would be mad at him the next day.

"And I was like, 'So what does it involve?' He goes, 'It involves everything but you,"' she recalled.

Others have also provided little about the young man who grew up in war-torn Bosnia and emigrated to the United States, where it appears he struggled to fit in. Some describe a "nice boy" who desperately wanted to be social and belong. Some say he had a history of violence, including trouble as a juvenile. His co-workers at Aramark Uniform Services said he would keep his head down, do his job rolling freshly laundered floor mats and leave.

The FBI said Talovic really left nothing behind for their experts to look at for a psychological profile.

"There really has been no written documentation that the subject left behind to be analyzed," FBI Special Agent Scott Wall said.

Three minutes

Talovic walked into Trolley Square armed with a 12-gauge shotgun and a .38-caliber handgun, wearing a backpack full of ammunition and a bandolier of shotgun shells around his waist.

Asked to provide a timeline for the events of the shooting, Burbank told the Deseret Morning News the killing spree lasted only three minutes.

The entire event lasted about seven minutes, police believe. Within the first three minutes, Talovic shot and killed Jeffrey Walker, 52, and wounded his 16-year-old son Alan "AJ" Walker in the parking terrace. Outside the mall's west doors, he wounded Shawn Munns, 34.

Talovic killed Vanessa Quinn, 29, outside the mall's Bath and Body Works store. Moving into the Cabin Fever card and novelty shop, he killed Teresa Ellis, 29; Brad Frantz, 24; and Kirsten Hinckley, 15. Hinckley's mother, Carolyn Tuft, 44, was wounded. So was Stacy Hanson, 53, who remains hospitalized in fair condition.

"In about three minutes he was able to cause all that destruction," the police chief said.

After three minutes, Burbank said Talovic encountered Ken Hammond. The off-duty Ogden police officer had just finished dinner with his wife at the Rodizio Grill when the shots were fired. He engaged Talovic in a shootout.

"He's walking through the mall and he's now distracted," Burbank said. "He's no longer actively looking for people. He's shooting at the officer."