each other to commit crimes or worse, mass murder. >> the suspect posted a pdf of his plans on 8chan, but that wasn't enough time for the fbi to react. >> clearly there was not enough time for law enforcement to be able to use that information to intercept this mass killer. it's not possible. >> reporter: nbc law enforcement expert jim kavanaugh says federal surveillance is not allowed. in that posting detailing his plans, the suspected shooter expressed his support for the shooter in new zealand at a massac massacre earlier this year, targeting muslims and killing over 50 people in christ church, posting his own diatribe with a link to the live streams of the slayings on facebook. a copy cat posted his own speech on a similar site before shooting up a san diego synagogue. at a senate hearing last month, the director of the fbi saying