I'm confused about the timeline in the NYTimes article. The gunfire was detected...

		kens on May 29, 2012 \| parent \| context \| favorite \| on: Gunshot detection system transforms and raises iss... I'm confused about the timeline in the NYTimes article. The gunfire was detected at 7:22:07, and tactical team arrives at 7:25:02 (Pacific). The article says, "Total elapsed time: 3 minutes, 55 seconds." Isn't that a total elapsed time of 2 minutes, 55 seconds?