I was just a teen at the time but when news began circulating that he got caught forging prescriptions and facing jail time, I immediately thought that he was going to take his life and that the family better keep a close watch on him. Never made sense to me that he went to Fritz's house and told him, "I love you dad... I really, really love you" and Fritz didn't find anything unusual about it, especially after Kevin had specifically called him and warned him that Kerry was on the way to his house and was "in a bad place." Also found it odd that Kevin left Chris alone right after Chris told him he was suicidal and had left a suicide note. Never made sense to me.
Never underestimate the power of denial, and just what people are able to ignore/avoid when they are not mentally ready to deal with it.