$850,000 in cash. and they warn tonight, he s armed and dangerous. here s abc s steve osunsami now. reporter: the fbi tonight says that what happened in an armored truck outside this louisville shopping mall was an inside job, and they ve named the driver one of their most wanted. 29-year-old mark espinosa went missing last month while his partner was inside jefferson mall moving cash. when espinosa disappeared, about $850,000 disappeared with him. the money was sitting in the truck. in radio calls from police, you hear them explain that the truck was still running. truck running, along with a weapon in the vehicle. reporter: investigators now suspect that espinosa left his weapons in the truck so he could get past airport security and fly away with the bags of cash. at this time, we believe mark espinosa has taken steps to plan out this theft and has taken steps to cover up his planning. reporter: they believe he s somewhere across the country, counting the money. police are