still looking to clear or determine who the second person might be. but sources say it's unlike linen else was involved. sean? >> thank you very much for your reporting. joining me our panel of law enforcement experts. former nypd deputy chief ed hartnet, fbi profiler casey jordan and former agent jonathan gilliam. what do you glean from this guy's background? >> lots of disturbing aspects of his background. obviously with 20/20 hindsight he had anger issues, discipline problems in h the military, work issues. i would have to look at that. i want to know if h he's under medical care, medication. how did he get to the area? how long has he been in the area? i would have to backtrack the atm use, credit card use, tolls, everything -- >> how far along do you think ter now? >> pretty far along. one thing i haven't heerd is was