Scott's Dead

A friend of mine died on tuesday, I wasn't told till friday. They say he hung himself, but I can't bring myself to believe that. I was one of the few friends he had, not many liked him because he was so strong willed and could not be brought round to a different point of view, in fact almost no one liked him. In that respect he was the last person that would have killed himself, he also did not agree with suicide. It happened in his exwifes house, not his own, this is also unusual and suggestive.
I may not have been a good friend to Scott, but he was always nice to me, even when we argued. I would like to make sure it was a suicide, but how does one go about disproving the police, and I have no connections. It wouldn't matter if I was wrong in my assumptions at least then I would know. I wish they'd told me sooner, I missed the funeral.