There's no seriously groundbreaking reason for this partnership. Other than they both share an onion. So instead of running away from that absurdity, why not run towards it?
Destroy the evidence.
In celebration of the new murder mystery, we encouraged people to order a Bloomin' Onion, kill it, and go to extreme lengths to destroy the evidence (the receipt).
Those who film themselves and show Outback proof get their next Bloomin' Onion free.