The article pretty much rules this out, no idea where you got the foul play angle from:
> "Lori Greenberg, his mother, said Monday he had no health problems and she was told by police who investigated Sunday night that there was no evidence of foul play, injuries or drugs."
That's a bit misleading. It says there was no evidence of drugs but then goes on to say that the toxicology report would take 2-3 months.
They probably just didn't see any drugs lying around. If he didn't have some sort of undiagnosed medical condition, he may have very well OD'd on something. Research chemicals, xanax and opiate combo, etc... It's fairly common for people to OD on those things and they're all readily available.
Toxicology results often take that long depending on how extensive the testing. Also people always jump right to the conclusion that drug abuse is suspected when they hear this. In a person his age and health with an unexpected death this type of test can be pretty standard and is often at the discretion of next of kin. These tests can help determine drug interactions and maybe assist someone in the future.
To give an anecdotal story. I use Diazepam to control muscle spasms and cramps caused by a neurological disorder.
I took my kids to an amusement park and took Dramamine (over the counter motion sickness medication) so I wouldn't get sick on the rides. About 20 minutes later I was a complete zombie, so bad I sat down and could not get back up because I was in such a stupor.
Turns out these two drugs have some serious interactions with each other, including sudden death and heart failure. To this day I consider myself lucky.
When I was in high school, an exceptionally popular varsity athlete was killed in his sleep by an anyurism. It was profoundly shocking to realize that things like that could - and did - happen.
Seemingly-healthy 28 year olds don't typically die at all, much less in non-obvious ways. An unexpected death rarely involves foul play. I'm sure the police are not ruling out possibilities at this point, but I'm equally sure that they are proceeding with the most likely avenues first.
> "Lori Greenberg, his mother, said Monday he had no health problems and she was told by police who investigated Sunday night that there was no evidence of foul play, injuries or drugs."