More likely they were trying to do a humane service to Kimmel's family.

Really? Bill text was too strongly worded for a such humane service and
included several referrals to various documents that charged FDR adm.with
conspiracy and that was the reason why no US president dared to sign it and no
US president will ever dare to sign it.
Its obvious if Kimmel exonorated,next step will be the reopening of Pearl
Harbor case,so the establlishment will prevent this no matter what.