By DAVE CAWLEY

West Valley City police missed their best chance to find Susan Powell — alive or dead — by just 10 minutes.

Those crucial minutes came on the night of Tuesday, Dec. 8, 2009, the day after Susan’s disappearance.

Her husband, Josh Powell, spent most of that day at police headquarters. He’d arrived around noon for an interview with Detective Ellis Maxwell that was scheduled for 9 a.m.