In Reptile (2023 film), Detective Tom Nichols (Benicio del Toro), who is investigating the murder of a real estate agent named Summer (Matilda Lutz), discovers that Summer has human bite marks on her hands.
This causes Tom to investigate further. He takes a dental impression of the main suspect, Sam Gifford, the victim’s ex-husband, and sends it to a forensic odontologist for analysis, but the results are inconclusive as the bite marks are not deep enough.
Later in the film, we find out that the murder was orchestrated by
Will Grady (Justin Timberlake), who is collaborating with some corrupt cops.
This makes me wonder why the killer or someone else bit Summer’s hands in the first place.