See... I don't like that. Too many tags.
Although I do agree that italics are overused.
I agree. I don't like the fact that she's avoiding italics by using so many tags. She thought, she thought, she thought. That gets annoying really fast.
To me, there is a way to seamlessly transition from narration to thoughts by using just a handful of tags. Once you establish the "present tense" is her thought, you can then ease into that and your readers will be smart enough to figure it's her thoughts (by the language, the tense, etc.) The problem with that passage is that she's mixing internal thoughts with external action, and that muddles everything.
Personally, I dislike books (especially) in 3rd person POV that rely so much on internal thoughts -- it's as if the author doesn't trust the readers, or her character's actions to convey these thoughts. I think it's a cop out when the narrator dips into the character's mind so much, trying to explain everything. When the author does that, I get impatient, as if she didn't trust me (reader) enough that she has to feed me everything.
I would have written it this way, moving all the internal thoughts AFTER the external events:
"Ellen hit the replay button before he could finish. Listening to it again, she slammed her hand against the wall when he said "injuring." She hit replay again, thinking she must have misheard him. Surely he meant that charges would be filed. No, she thought, this is nuts. You stupid, stupid people, injuring isn't the right word. Try killed.
When she'd talked to the police, they had sounded so clear about it, the only question what the charge would be. Reckless homicide? Vehicular manslaughter? Her child was dead, some one's careless action had led to his death. No charges? Impossible. When the message played again, she wrote down the phone number, then punched in the buttons on the phone."