Katherine and Louis Kealoha admit guilt

Former Honolulu police chief Louis Kealoha, right, and his wife former deputy prosecutor Katherine Kealoha, walk out of federal court in June in Honolulu. (AP Photo/Caleb Jones, file)

HONOLULU — Once one of Oahu’s preeminent power couples, Louis and Katherine Kealoha’s stunning fall from grace continued Tuesday with both pleading guilty to additional federal charges.