in the middle of the night. police say the suspect is a graduate student in criminology at washington state university. in a chilling social media post, the suspect tried to solicit information from criminals to quote understand how emotions and psychological traits influence decision making when committing a crime. let's go to cnn's verronica miracle live in idaho. how did police get this guy? >> reporter: alyson, so much information has come out in the last 12 hours. so much that we've learned about bryan kohberger and a source telling pamela brown just recently that prbryan kohberger drove his white hyundai elanta across the country to pennsylvania for christmastime and that source telling cnn during that time police were tracking his cross country drive and they were also surveilling his parents' house and it was