GENESEO, N.Y. -- Originally deemed a suspicious death, the stabbing death of a Rochester man in the town of York, Livingston County, is under investigation as a homicide until, as the sheriff said, evidence proves otherwise.

Marcus Postell, 22, of Rochester, was stabbed to death Monday night. The sheriff identified Postell on Tuesday.

Deputies responded to a Fowlerville Road house just after 10 p.m. after receiving a 911 call from a woman named Danielle Allen reporting a disturbance. Once on scene, authorities say they immediately began an investigation into the death of a man found inside the home. 

Livingston County Sheriff Tom Dougherty says Postell was found dead on arrival. The Monroe County Medical Examiner's officer will assist in determining a cause of death.

Sheriff Tom Dougherty originally ruled this a death investigation.  He said until evidence proves otherwise, this is now being investigated as a homicide.   

"When I say death investigation you have two different things, is it a homicide or is it a suicide?  So we need to look at all different angles and rule which one it is based on what we know from the caller and what we know from the evidence on scene."

Dougherty said Allen, who is the daughter of New York State Police Major Richard Allen, and Postell were in a romantic relationship.

Dougherty says the investigation so far has turned up nothing violent in Postell's background.  No charges have been filed.

"I'm not ruling out charges, I'm not ruling out no charges," Dougherty said. "You have two people that know what happened and one's not here to tell his story, so we have to take the story that we have and we have to take the evidence that we collected and continue our investigation collecting information and make a good determination on our information and belief of what occurred."