i know your jurisdiction in las vegas but he lived in mesquite, nevada. do police there have any record of criminal activity? >> i'm told they do not, either. they have not had any criminal activity in mesquite. like i said, we check local, state and federal systems and we don't find anything anywhere. >> bill: sir, our best to you. thoughts and prayers and everything else we can send your way. >> we need it all. >> bill: this is just the beginning of this. thank you very much for your time, sir. the undersheriff in las vegas. >> we'll bring in daniel linski. he was an incident commander for the boston bombing and former chief of police. he was at a conference for security and law enforcement at mandalay bay recently. daniel, what can you tell us about this particular building?