Stockton, California - Is There a Serial Killer?

There may be a serial killer, an active serial killer operating out of Stockton, California. There have been six homicides and one attempted homicide in the city that seem to be connected through ballistics. An unidentified person was recorded on grainy security video that could be either a witness, a suspect or possibly just a person of interest. And there's been a call by news agencies to watch this specific video and see if you know anything,. especially if you live in California or in the Stockton area.