Frustration had mounted that the murderer had managed to get away and that a clear image of his face hadn't emerged - until a Reddit post finally put police on his trail.The suspect in the Brown University shooting was found after police received a tip referencing a post on the social media platform Reddit, they have revealed. Two students, Mukhammad Aziz Umurzokov and Ella Cook, were killed and nine were injured during the shooting inside a classroom building at the Ivy League university in Providence, Rhode Island, on Saturday. Frustration had mounted in Providence that the murderer had managed to...