Dan Conley announced his investigation found law enforcement officers were acting in self-defense when they shot 26-year-old Usaamah Rahim in a Roslindale parking lot.
The decision means the students are to be considered employees of the school, not just students.
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The New England Organ Bank says in 2011 about eight percent of heart transplants involved donors who died of drug overdoses. So far this year, more than 30 percent the transplants involve hearts from someone who overdosed.