Max Kane is the father of Jesse Kane. He disappeared over five years ago and Jesse has been looking for him ever since. It is suspected that some bones found on a golf course belonged to him, however they were later proved to be someone else's. Jesse suspect's Karen, Max's girlfriend, committed the murder. However, Max Kane's body was never found and so legally, he is only missing. This means that Karen had a lot to stand for his disappearance as Max and her had joint bank accounts etc and the Kane's were wealthy. Therefore, without a legal death, the will, will be irrelevant leaving Rachel to retain all the money and properties.
Bones: Series 1, episode 14 (The Man on the Fairway)