Where should I start?

Hint 1 of 5:

Have you read the newspaper to see if you can gather any further information
on the wolf killings?

Hint 2 of 5:

Didn't Grace send a package to Gabriel?

Hint 3 of 5:

Who's address did Gerde give her?

Hint 4 of 5:

Go to Ubergrau's office and pick up the package.

Hint 5 of 5:

Did you read it's contents?