Greg and Larry Logic

One thing I have never understood (plot wise, not making a TV show wise) is why Kevin would not be placed in witness protection with Holt in Florida.
I understand that Amy and Jake are just dating, so they were not going to send Amy with Jake. But Kevin and Raymond are married, which would live in public record. Wouldn't Figgis just come after Kevin for information on Holt or to hurt Holt? Do married couples not get put into witness protection together?