Lili Reinhart’s quote makes it sound like she thinks Hiram Lodge has a hand in this Riverdale mystery, which would makes sense.
Lodge also had the added bonus of hurting the man that slept with his wife while he was locked up, which he’s been unreasonably calm about since returning.
While he might not have been the man to pull the trigger, there’s no denying he’d benefit from the violence around the town.
Then again, Hiram just paid Fred Andrews’ medical bills (by force), and conceded he needed him for the next stage of the Lodges’ plan.