A neighbor saw suspicious activity, but wasn't sure what it was so never made a call that might have prevented the attack.
The governor has signed a bill to fund classes to educate people on what specific things to look for that could signal a possible attack.
Assemblyman James Gallagher says this isn't about people making citizens arrest.
It's about calling law enforcement.
The classes which will be taught by the office of emergency services won't be available for at least two years.