When Levitt (Ron Carey) says he had a yellow ribbon left over, he is implying he wore a yellow ribbon in support of the Iran Hostages who had finally been released on Jan. 20, 1981, after 444 days in captivity. This is "Day One" for Barney.
One of only a few episodes that showed scenes outside of the squad room.
Usually when a police officer is in need of legal representation for something done while on duty, the Police Union will provide an attorney for them. Union fees would have paid for this service.