State prosecutors have not brought charges in shooting death of Trayvon Martin . The case has been a source of tension between the Justice Department and local police departments across Florida. He says in 1964 , the Civil Rights Division was able to obtain convictions in three killings . Mills : The current federal investigation could help establish facts , defuse tensions .
State prosecutors have not brought charges in shooting death of Trayvon Martin . Nicolaus Mills says the news that the federal government will investigate is welcome . He says in 1964 , the Civil Rights Division was able to obtain convictions in three killings . Mills : The current federal investigation could help establish facts , defuse tensions .