Discussion: How do we stop mass shootings?

Today in San Bernardino, Calif., police agencies continue to investigate the shooting that killed 14 people. Some key questions we're all asking are: why did this happen? How did it happen? And how do we stop this from happening again?

Joining FOX 7’s Mike Warren is Michael Reyes, who used to run the ATF office in Austin and is now a security consultant, to take us through the massive investigative process in this case.