How investigators zeroed in on the Brown University shooting suspect and linked him to the killing of an MIT professor

Five days after an extensive manhunt began, law enforcement closed in on the Brown University shooting suspect after the emergence of apparent ties between the attack Saturday at the Providence, Rhode Island, school and the killing two days later of an MIT professor at his Massachusetts home.

​ Five days after an extensive manhunt began, law enforcement closed in on the Brown University shooting suspect after the emergence of apparent ties between the attack Saturday at the Providence, Rhode Island, school and the killing two days later of an MIT professor at his Massachusetts home. Read More Breaking News, Latest News and Videos | CNN