Unless it's the truth, that is.
The girl doesn't seem to be terribly bright, and if she was involved it will no doubt come out.
I too find the circumstance suspicious, but let's not assume her guilt without real evidence.
Not necessarily. The police can declare her "a victim in every sense of the word", put out an incomplete report based on what she claims, and close the case.
Why did Hannah write letters to this man? It’s sounding like Hannah was attracted to this man.