RICO shouldn't, and doesn't, need to return because, as others have said, it is simply too broad and powerful. This was the reason it was removed in the first place (among other issues with the FBI at the time).
Instead, there should be systems or processes added to place that supplement the OOC rules to verify the integrity and reliability of evidence so that the hard work detectives do don't get voided at the last minute because of suspected metagame or powergame. Good place to start may be verifying with UA, before thorough investigations begin, that a certain confidential informant is actually a long-term player that would have realistic knowledge of a faction's high command identity/activities instead of an ordinary member with a mere grudge, or a new member with no knowledge of what they're really doing.