warrant just two months into the mueller investigation, asking for access to his g-mail and the like. so it's possible that federal investigators for months were monitoring michael cohen's transmissions and stuff before anything about the raid on his apartment and the like. >> so when you look at how much mueller had, cohen's e-mails going back to the same month that trump declared he was running for president, mueller is tracking his phone calls before the fbi conducted multiple raids. investigators also used a device caused a trigger fish to figure out which hotel room he was in. the links that they went to, what does this say for others being investigated? someone like roger stone? >> yeah, it shows really the thoroughness and professionalism of both mueller and the southern district separate investigations. you might remember when michael cohen's office was raided, president trump and his lawyer, rudy giuliani, freaked out,