What it takes to search for a fugitive

The manhunt for convicted murderer Danelo Cavalcante, who escaped from a prison near Philadelphia last month, is nearing the two-week mark. So how do authorities find him?

(Image credit: AP)

​The manhunt for convicted murderer Danelo Cavalcante, who escaped from a prison near Philadelphia last month, is nearing the two-week mark. So how do authorities find him?