It isn't just that he lied, it's what he lied about. What he stated he did doesn't match with his cell data and his truck gps on the day he took a last minute work trip. That is what does it. He could have lied about what time he went to bed, what he had for dinner, what he did at the job site, having an affair, etc.. that makes him just a liar. Lying about what he did the day his wife went missing, the state of their marriage, deleting texts, etc. That is why he's in this mess. A person can be a liar and not be suspected of murder. I person can't lie about facts related to a missing person and not be suspected. Innocent people don't need to lie about these things and most people even liars understand the need to be honest with police so they aren't in trouble. It's totally different lying to people than it is lying to police. That shows a sign you are hiding things. If he was honest from the first police interview (and he was innocent) then we wouldn't be here today.