he reportedly left the gathering hi wife, 29-year-old tashfeenn malik. >> it seems hard to believe all of this was spontaneous -- >> we said yesterday there appears to be a degree of planning that went into this. >> reporter: at 11:00 a.m., a couple entered the conference room wearing tactical vests and armed with rifles. >> need assist now, i have shots fired. >> we believe the suspects when they entered fired between 65 and 75 rounds. they sprayed the room with bullets. >> reporter: within four minutes a massive law enforcement response. >> i realized edd as i was getting closer that i was one of the very first units this. when we entered there was fresh gun powed exert smell of gun powdwd in the air leading me to belilie that there was, in fact -- there were, in fact, shooters still. >> reporter: matt and three others headed east toward the conference room where police say 70 to 80 people were present. >> it was immediately evident were 100% true. there wereictim hot were clearly -- obviously deceased outside the conference room. >> reporter: later authorities discovered an explosiv