After thousands of hours and over a hundred interview, Boulder Police Chief Maris Herold said on Friday that the motives of the Boulder King Soopers shooter remain unknown. I guess they didn’t have a chance to look at his social media page before Facebook took it down. Investigators so far have spent more than 3,000 total hours conducting 156 interviews and gathering more than 223 leads to unravel what might have motivated the suspect, 21-year-old Ahmad Alissa, to travel from Arvada to Boulder to open fire on shoppers and workers in the middle of a Monday afternoon.