For some reason, I never caught that there was no radio in the contacts list. Talked to Azuria and she introduced a new contact. Talked to Becktrees and, lo' and behold, he gave a scanner. Now all the Detectives are where they belong, banished back to their proper contact tab. Somehow that initial contact got dumped, which happened shortly around one of the updates, or I forgot that I hadn't talked to him initially. Thank you for pointing out the missing/absent scanner and leading to the fix!