Aram Boghosian for The Boston Globe

Graduates line up to take their seats during the academy graduation ceremony for Boston Police Class 51-12.

Aram Boghosian for The Boston Globe

Graduate Colleen Murphy, left, is pinned by her father Buddy Murphy, a Boston Firefighter.

Aram Boghosian for The Boston Globe

Erin Burke, left, pins her husband John Burke.

Aram Boghosian for The Boston Globe

Graduates take their oaths during the academy graduation ceremony at St. Peter's Parish and Teen Center in Dorchester.

Aram Boghosian for The Boston Globe

Mashpee graduate Ryan Nardone, right, gives his mother Shawn Nardone a hug after the academy graduation ceremony for Boston Police Class 51-12.

Aram Boghosian for The Boston Globe

Graduates Ryan Nardone, left, and Paul Young congratulate each other following the ceremony.