It's wider now than it was in 1979.
Caesar Goodson, the officer who drove the police van the day Freddie Gray died, has been cleared on all charges.
The mayor has appointed a civilian to head up the department until a replacement can be found.
The trial starts as the state's attorney faces defamation lawsuits from five of the officers charged in connection with Gray's death.
Some lawmakers in the state want to raise the age to reform the criminal justice system.
Arlene Holmes says she hopes to help other parents see warning signs.