Huge case - one of the most important of his life, I would imagine - and he got a chance to interview the Ramseys for as long as he wanted - and he didn't even finish two days.I think 7 posters here, brainstorming, could have asked better questions for twice as long - - and no one would have been at all interested in "bolting".
(Notice - he caught a plane - he planned to leave then - no emergency - - he simply had something better to do.)
I would also point out that the mention early on of reciprocating later, talking more and sharing... that was certainly not part of Mr. Kane's plans.
I really don't think Kane wanted all the answers - - just BORG affirmations - and he didn't get those.