A high-ranking law enforcement official told his newspaper that investigators were "going through receipts and going through sales records from those stores." Police believe this is Mark Anthony Conditt, dropping off two suspicious packages on Sunday at a FedEx store. Federal search warrants were then used to get the man's IP address, which showed that he'd been making "suspicious" Google searches, Plohetski said. Late Tuesday night they used cell phone technology to track Conditt to a hotel in Round Rock, about 20 miles north of Austin, according to the American-Statesman. There, they spotted the vehicle witnesses had told investigators he was driving.

Source: CNN March 21, 2018 13:15 UTC