His father just called him. He finally told his father about Kris' situation, and his father immediately offered to help him. Of course, Kevin welcomes any help as long as he can find Kris soon.
He intended to hide Kris's circumstances from the others, but he knew that it would be hard for him to hide the real situation. Kris was missing, and if the others asked him why they didn't see Kris lately, he would need to lie to answer the question. That was why he decided to tell the truth instead of keeping lying.
He was currently at his biological parents' house with Blue, Jack, Casper, and Luke. He purposely invited the four of them to talk about some things at home after they all knew the real situation.