I'm sure the police are advising her not to.
Everyone is already suspicious of everything that she does.
Could you imagine if she actually found some evidence implicating someone else?
No one would believe her.
She's in a lose/lose position no matter what.
Also, I think the loser emoticon is a little over the top, especially for actually doing something the right way this time.
Like I said, someone will find fault with whatever she does no matter what. If she were out there digging in dirt, people would be freaking out about that too.