Well, she can try.
More importantly, what are the odds that she's the only cop in Dallas that was working longer than 8 hour days? I'm going to guess roughly 0%. For that matter, I know volunteer firemen that are expected to be on call for longer hours, *and* hold down a regular job aside from that. Exactly 0 of them have ever made a mistake close to this, even when after being called out for actual fires and other emergencies.
Hahaha, no.
Let's get one thing clear. The jury is mostly black and Hispanic people. The judge is a black woman. They have nowhere near the leeway that white people, and straight white men in particular, do when it comes to using their discretion. I've already seen quite a few people (all white) stating that they're "glad" that the jury didn't go the way of "racial revenge", and I'll offer
this jackass as an example.
Let's say they give her 99 years, the maximum. I guarantee that the appeal would say that the jurors/judge were racially biased towards the murderer - and there's a very high chance it'd work.
Is 10 years fair? Absolutely not, considering how many drug addicts are in prison with longer sentences. Will it hold up on appeal? Most likely.