You don't need its stats. It doesn't act separately
It's a trait. When you have him and he can help, he's just a -1 difficulty or +1 Momentum. Attacks on him are just "remove a trait" actions: diff 2 for rest of scene, diff 4 for ganking him.
When you use him for trailing, you can follow trails you normally couldn't (scent trails).
When you and he gang up on a target, +1 momentum or +1 CD.