Det. Arnold Flass
Ring of narcotic detectives who run a drug supply
Leader of ring (Lieutenant Bill Cranston) collects the supply and passes on to detectives to then supply a list of authorised dealers. 
Dealers not on the list are busted by narc squad. 
List comes from ‘The Penguin’ but no one’s actually met him or knows who he actually is. 
Lead of narc squad resupplies every third Thursday during a night shift. 

Ambushes Flass but Flass actually manages to fight back
Scuffle, Flass get knocked out. Wakes up in an abandoned abbatoir/meat-packing plant - one that the narc unit previously raided as drugs were being shipped inside carcasses. shut down the operation (as a 'win' for GCPD and some raises/awards for the narc unit) and then took it over for the Penguin.

‘Please god don’t kill me’
‘You’re praying to the wrong person’

Some Oswald stuff, some GCPD stuff with Jimmy and Harvey 
‘I quit smoking’
‘You looked daft, Gotham only city where quitting hurts your life expectancy’

Flass brought before Penguin for blabbing. 
Bird puns. ‘Squawking’, ‘canary’, ‘stool pigeon’ etc.