You can sue his "estate," or the assets he left behind, and IF he left behind sufficient money or liquidatable assets to pay the rest of your loss, you could potentially recover your losses from the estate. But bear in mind that if he had minimum coverage, he may not have had much in the way of money or other assets (so you may not recover anything), and the only way to get at anything he left is by suing--and you generally have to file the lawsuit before knowing for sure if it's worth doing (since you can only get information about his estate's money and assets after you sue it).Suing the estate is the only way to get any money, since 1) his insurer does not owe any more than the policy limits (e.g. $15k) and 2) your insurance would only pay if you have the appropriate types of coverage (e.g. collision for your car; your own liability coverage will pay nothing to you, since it pays out to others hurt by you).