plantation, florida. >> we can confirm that 13 ieds were sent to various individuals across the country. these are not hoax devices. >> reporter: sources say, investigators used his cell phone to track him. after dna evidence was found on some of the packages. in addition -- >> they uncovered a latent fingerprint from one of the envelopes containing an ied that had been sent to congresswoman maxine waters. >> reporter: one of the reasons authorities arrested him in a public place was because an address associated with him in florida might pose a danger to officers if there were explosives present. officials say that he was living with his parents, but they had kicked him out. and so was living out of his van. which authorities took into custody after he was arrested. the van covered in political decals, images of the president and vice president. one saying, "cnn sucks." >> cnn sucks!