Kim and the Feds.

When Saul went on the run why didn't the Feds interview Kim in Florida?As his ex wife wouldn't they ask her if he was still in contact with her?Ask her about Saul's contacts and if she had any idea where he might hide.Naturally the Feds knew nothing about her past with Saul.But I thought they might want to interview her.I doubt Kim would have told them anything.