What should I do here?

Hint 1 of 7:

You could try breaking the ice with a little witty conversation.

Hint 2 of 7:

Did you notice the map on the wall?

Hint 3 of 7:

Why don't you take a closer look.

Hint 4 of 7:

Did you ask about the murder locations circled in red?

Hint 5 of 7:

What's that note?

Hint 6 of 7:

Maybe you should jot down the phone number.

Hint 7 of 7:

You could probably use a little privacy to follow up on your lead.