I believe under the circumsatnces if he was not under a doctors care for a condition likely to cause death an autopsy is called for.
The original report on Reuters (which can be seen at http://webcache.googleusercontent.com/search?hl=en&gbv=2&num=10&lr=&ft=i&cr=&safe=images&tbs=qdr%3Ay&q=cache:xayYWVqBdYUJ:http://www.reuters.com/article/2012/03/01/us-usa-politics-breitbart-idUSTRE8201AV20120301+Orson+Bean+heart+problems+site%3Areuters.com&ct=clnk ) had his father-in-law saying he knew nothing of any coronary problems and had the coroner’s office saying that he had medical issues and hadn’t seen a doctor for over a year. Not sure how they knew that since they said they didn’t have his medical history yet.
It’s a big jumbled-up mess of conflicting claims.