Detectives say Stephen Anderson, 51, was found dead in a property in Gartcosh, Lanarkshire, at around 12.50pm on Tuesday afternoon.
Emergency services rushed to an address in the town’s Slakiewood Avenue after the alarm was raised.
Since then, cops have been on 24-hour watch at Stephen’s home in Tillycairn Drive, which is a short drive from where his body was found.
He is believed to have lived there with his wife, Karen.
Officers have also been keeping guard at an address in nearby Craigievar Street, Garthamlock, thought to be the home of Stephen’s sister, Lynn.
The Anderson family are “devastated” by the tragic loss, police said.
A post-mortem examination has been carried out, with further tests still to come.
But detectives have confirmed that they are treating Stephen’s death as suspicious.
Cops are appealing for information as they step up their investigation.
Detective inspector, Grant MacLeod, from Police Scotland’s major investigation team said: “Mr Anderson’s family have been left completely devastated by his death and it is absolutely vital that anyone who can help us provide them with answers comes forward.
“I would like to speak to anyone who was in the vicinity of Slakiewood Avenue between 8pm on Monday, October 29, and 12.50pm the following day when his body was found, and ask them to please get in touch.
“If you saw anyone arriving or leaving the house where Mr Anderson was discovered, or someone acting at all suspicious in the area, contact the police.
“No matter whether you think your information is significant or not, let our team of detectives determine that, as even the smallest detail could be important.
“I would also ask anyone who was in the company of Mr Anderson between that time period, or who has any information about his movements in the lead up to his death, to get in touch.”
It is not known why Stephen was at the address in Slakiewood Drive at the time of his death and police have given no further information with regard to his final movements.
Residents living in Slakiewood Drive, near Mount Ellen Golf Club, complained of being left in the dark while police kept the area on lockdown.
One man said: “Everyone’s talking. Everyone’s trying to find out what’s going on but no one knows.”
The investigation into Stephen’s death continues.