Tyrell's death.
Someone on another post already mentioned this and it aroused my own suspicions.
Is it possible that Leticia actually killed Tyrell herself (by accident) then invented the "hit and run" story?
We had already witnessed earlier in the film that Leticia had some serious emotional problems and had little control over her violent impulses with her son (hitting him over the candy bars).
And note that we NEVER SEE the child actually get hit by a car. The car breaks down, they get out, and she kind of loses it with him again. We cut back later and Tyrell is already lying unconcious (or dead) and bloodied with Leticia screaming over him before Hank arrives.
And later, when Hank takes her to her place she gets kind of upset at the thought of them conducting an autopsy on him (Tyrell).
Maybe because the truth might come out?
Is it that maybe Leticia just get frustrated with him being slow (and overweight which she already had a problem with) and snapped, hitting him too hard this time, then freaking out in remorse and inventing the story of a hit-and-run as a last-minute act of self-preservation?
Anyone else ever have this thought?