The suspected gunman in the deadly school shooting in Parkland is reportedly a troubled former student obsessed with firearms. One fellow student says he always tried to avoid him. That student saying that 19 year old Nicholas Cruz actually joked about "taking out" his schoolmates on more than one occasion. Cruz had been expelled from the school for disciplinary reasons but returned this afternoon, and allegedly opened fire. Sheriff Scott Israel says that 12 victims were shot dead inside the school. A total of 17 are reported dead. At least 20 are injured. Five are reportedly in critical condition.Sheriff Scott Israel says that Cruz used an AR 15 rifle, and that he had several magazines. Israel says they've started looking into the suspect's social media profile. He describes it as "very disturbing."Prior to the shooting, Parkland was rated as the 15th safest city in the country and one of the safest in Florida. For more, click here.