Killing Silence - The Loser Mysteries, #1

Loser washes up in gas station restrooms, wears Salvation Army giveaways, and eats what she can find, beg, or filch. Life on the streets of Richmond, Virginia, is hard, but it's better than facing her demons. That is, until she meets Bryn, a little girl who steals her heart. When Bryn's daddy is accused of murder, there's no one willing to help except Loser. Penniless, almost mute, and terrified of failure, Loser attempts to gather her resources and prove Nick Saraff is innocent of the crime.
The problem is that now she's in as much danger as Nick. Someone is working against her--someone who's more than willing to kill again.