"That officer is in a very, very tough place; unimaginable what that officer has to be feeling right now," Chicago Police Supt. Larry Snelling said.

Rivera, 36, a four-year veteran with a young daughter who lived in the Irving Park neighborhood on the Northwest Side, was killed after the Gresham (6th) District tactical team she was part of tried ...

Snelling also said that Rivera was "a mom." He said officers had to "deliver this type of message to her mother, her very young daughter and the rest of her family. It's a brutal thing."