As of Friday, the city of Chicago has 70 additional police detectives.
Police Supt. Garry McCarthy and Mayor Rahm Emanuel attended the morning ceremony at Navy Pier. It's the first detective class to graduate from the Chicago Police Department since 2008.
"You have an opportunity, a great opportunity to make a difference every single day. Do not lose faith when you get frustrated," McCarthy told them.
The officers join more than 850 current detectives who aim to close cases and make Chicago a safer city.
"We've got to make this a safer city," said Det. Brian Tierney. "I guarantee we're all going to work really
hard to clear these cases [and] to bring justice."
Ten military veterans were among those who graduated to the rank of detective.