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|Mentioned||"Goodnight, Sweet Grimm"|
Sergeant Franco is a police officer who appears to be under Sergeant Wu and works in the Homicide Department. He appears to share many of Wu's duties and possibly fills in for Sergeant Wu whenever the latter is busy elsewhere.
He was the present at Ryan Showalter's condominium when Nick Burkhardt and Hank Griffin arrived. Back at the precinct, he told the detectives the results of crimes from other cities when they arrived.
Franco was at the scene of the murder of the Weller couple. He later called Hank after finding Demitri's abandoned and salvaged car and stayed at the scene until they arrived. He tried to capture a man lurking in the nearby abandoned warehouse, but the man injured Franco's hand and escaped.
After receiving a phone call warning that a Nuckelavee has been sent to Portland, Renard called Franco into his office and told him to track down the possibilities. Franco later reported to Renard that "an unidentified man had arrived in the city from Rome before disappearing and at about the same time as the man's arrival, a taxi and it's driver had disappeared".
Franco, who has been promoted to sergeant, arrives with Wu at the house where Richard Mulpus is rampaging and find the body of Lilly O'Hara. He is attacked by Mulpus, and when Wu attacks Mulpus and is knocked down, shoots and kills him.
Part 1, "Deep Freeze"Edit
Part 3 "Tight Squeeze"Edit
He and Wu cautiously enter Bud's shop with guns drawn in response to Bud's 911 call. When Bud emerges from the freezer, they both look at him and the zombie attacks from behind. All three retreat to the freezer which Wu locks with a wrench before calling for backup on his radio.
Part 4 "Dance with the Dämmerzustand"Edit
When Wu hears a voice outside and opens the freezer door he watches while Hank fells the zombie with one punch.
- Franco seemed to fill in for Wu in the episodes "Tarantella" and "Last Grimm Standing".
- In the episode "The Waking Dead" he has been promoted to sergeant, as seen on his name patch.