According to the end narration, the suspects were convicted of three counts of conspiracy and grand theft, one count for each victim shown. However, during the episode, it was repeatedly stated that there were many more victims, at least a dozen, possibly two dozen total, that should have accounted for many more charges against the suspects.
"Agent Montgomery" repeatedly refers to the "state banking commission." California has never had a regulatory body identified as a "banking commission" - at the time, bank regulators were part of the State Banking Department. Successful con men would have known and used the agency's correct name, lest their victims become suspicious.
Jack Webb appears in the final scene confronting the suspects while holding his badge loose in the palm of his hand. Webb, who was notoriously meticulous about the smallest of details, should have known that no police officer would hold his badge in such a way. Police badges are susceptible to damage and scratching, so plainclothes officers keep them in special wallets or protective cases that can be worn on a belt clip or neck chain.
When the phony bank examiners knock on the door Friday retreats in to an adjacent room and closes the door behind him before Gannon opens the door. During this sequence a quick shot is shown from behind Friday in the other room as he is watching Gannon and the two con men through the door which is now opened approximately 8 to 10 inches. Opening that door did not alert the two criminals or even Gannon in any way. Later Friday opens the now closed door with his badge and gun in hand to the surprise of the two criminals.
While the Los Angeles County Mortuary does cremate indigent individuals, the remains are not kept indefinitely in jars. Legal next-of-kin have three years to claim the cremated remains, after which they are buried during an annual funeral ceremony for unclaimed persons.