Increasingly, public reaction to mass killings is driven by media coverage. And with the 24-hour news cycle, it’s hard to escape. Criminology Professor  James Alan Fox  ( @jamesalanfox ), Boston Public Radio Co-Host  Margery Eagan  ( @MargeryEagan ) and UMass Boston Psychology Professor Gonzalo Bacigalupe ( @bacigalupe ) discuss the impact of the media.