"... police say. Elk Grove cops arrested three people on Monday after the vigilant cabbie dialed 911 after dropping the group off at a Holiday Inn. Keith Avila, a married father of one in Sacramento, had just logged in to Uber and was picking up his first passengers for the night: the teenager, whom authorities would later reveal was a runaway, and two older women."
Here he is, still in his car, explaining what happened into his camera, as the police activity unfolds behind him:
ADDED: I don't think Avila was trying to make a viral video. I assume the police asked him to wait while they handled things and they would come back to take his testimony. He was very upset and he also needed to collect his thoughts and remember the details. He's an important witness and getting out the phone and making this video is an excellent idea from a legal standpoint (don't you think?). Emotionally, for him, it was also good. He was alone and this seems to have given him a way to comfort himself and to reach out to other people. He was also sincerely and justifiably proud of himself and wanted to memorialize the occasion. The virality of the video is a bonus, and it's especially nice virality, because it lets us experience his heroism and internalize the example he's set. It will, I hope, inspire others to notice their surroundings and to understand that calling the police is the proper response.
And the police come quick. They don't play around.