He did but you have to take it on the context of the circumstances and the entire interview.
He hadn't seen his wife or kids for over a year then gets communication from Ruby telling him to pick his kids up from the Police station as there's been an emergency.
He arrives expecting to collect his kids then is taken into a room, read his rights and questioned for 25 minutes without the Police telling him what has happened but if you watch the full interview it comes across that they may be suspecting him of something.
At one point they are asking about Jodi and say 'so you value Jodi?' and he says 'I don't know what that means? He's brainwashed at this point and when they clarify what they mean he says Jodi is a honest and trustworthy individual.
In the 1st 25 minutes they ask lots of questions about discipline, Jodi, the separation with Ruby, 8 passengers, the current physical state of his DC and so on.
Early in the interview he says he was contacted by someone to collect his kids but he declines to say who. It was Ruby.
At one point they ask if he has any questions and he says 'I want to know what is going on and why I've been asked to pick up my kids' but they don't give any information.
They try to trip him up or the detective was confused but they claim he said that someone from the Police station contacted him to collect his kids when he had never said that but that obviously looked to him like they were trying to trick him.
After 25 minutes of questions with him not knowing what was going on, they say about the boy knocking on doors and being emaciated and then Kevin says 'what does emaciated mean?' and the detective explains and then talks about duct tape and wounds and Kevin says 'what?' a minute or so later they say the DC are under medical care right now and Kevin says 'what does that mean?'.
They leave him alone for a few minutes and then come back in and Kevin says he feels like they've got his DC confused with somebody else and he's having a hard time accepting why they're saying.
So him saying I don't know what that means/what does that mean happened 3 times in about 30 minutes and I think it was just him wanting confirmation in a high-stress situation where he was being interviewed by Police under caution without knowing why he's being questioned then has a bomb dropped that his kids look like they were being tortured.