The Boulder Police Department held a news conference Friday morning on the ongoing investigation into the mass shooting at the King Soopers store on Monday.
Investigators said the gun used in the shooting was purchased legally -- and warned it would take about a year before the case will go to trial.
The motive behind Monday's deadly shooting at the King Soopers store in Boulder remains unknown.
Police have identified the people who were killed in the shooting at a grocery store in Boulder, Colorado. Now, investigators are..
