Giandomenico Morini 3
Giandomenico Morini is a colleague of Lorenzo Fabbri and they work on every crime together.

He owns a fish called Filippo, who is named after his boss, Filippo Gori.

Before the 14th season, he goes to Milan so his ailing mother can get the operation she needs there. He goes without saying goodbye to Lorenzo and leaves him a letter explaining the situation, but tells Gori and Katia everything.