At the end of Reptile , Tom Nichols uncovers that Summer’s murder was part of a much bigger corruption cover-up, and Will Grady is the one ultimately arrested for her death.

What happens in the finale

Tom realizes the case is not just about one murder. It connects to a network involving police, property, and drug trafficking, and several people around the case are implicated.

The last confrontation

In the final stretch, Tom goes to Robert Allen’s house, where the situation explodes into violence: Robert is shot, Tom kills Marty, and then Tom has a shootout with Wally before escaping. The film also leaves the fate of Eli ambiguous, but strongly suggests he was killed and cleaned up afterward.

Who killed Summer?

The movie reveals that Will Grady was involved in Summer’s murder, and the killing was tied to stopping her from exposing the broader criminal scheme. Earlier suspects like Sam are effectively red herrings, since his death is later tied more to the drug stash than to Summer’s murder itself.

The ending’s vibe

The final scene is bleak rather than neatly satisfying: Tom gets to the truth, but the conspiracy is bigger than one person, and the film ends with a sense that corruption has run deep through the whole case.