What Dave doesn't want to tell you for fear of bringing "them" down on him is that he is the key figure in an ongoing government charade, the plot to conceal the truth about the existence of extraterrestrials. It's a global conspiracy actually, with key players in the highest levels of power, and it reaches down into the lives of every man, woman and child on this planet, so of course no one believes him. He is an annoyance to his superiors, a joke to his peers. They call him Dmcowen , whose job was terminated for attempting to harness government resources in the quest for ETBE, who was possibly abducted by aliens when he was just a kid, and now chases after little green men and all other manner of impending calamities without even a badge and a gun, shouting to the heavens or to anyone who will listen that the fix is in, that the sky is falling and when it hits it's gonna be the shit-storm of all time..
What he doesn't want to tell you but what he knows to be the truth is that that building was destroyed not by a truck borne fertilizer bomb, but by a large chemical explosive hidden in a soda machine for the sole purpose of destroying evidence related to this ongoing conspiracy.
I have probably said too much, but I am willing to shoulder this burden.