His partner, a former Duke Doctor, was also found inside the home injured, but he is expected to survive. Police say the family moved to Seattle two weeks ago.
The Seattle Times identifies him as Dr. Louis C. Chen.
Several sources are reporting that Chen remains in serious condition at a Seattle Hospital, under police guard.
The Seattle Times also reports that prosecutors in King County have found probable cause to hold Chen on two counts of homicide and plan to book him once he leaves the hospital.
Authorities found Chen inside his 17th floor apartment along with his 29-year-old partner and their 2-year-old boy.
Authorities say the former Duke Doctor had cut wounds when they transported him to the hospital. He also may have taken a combination of drugs.
Police haven't released much information and haven't identified the doctor or the victims, but address records show the family lived in a Durham home.
"I just saw them coming and going," former Durham neighbor Ben Grad said. "They had a little kid."
Grad says the family moved out less than a month ago.
"I think it's strange you know," Grad said. "I guess anytime you hear something like that, it's out of the ordinary. It's too bad. It was a cute little kid. They had a nice little family."
Durham police say there was a disturbance call at the home on July 6th of last year, although no report was written.
Seattle police says the crime was an isolated event, and there's no threat to the community.
Duke Medicine hasn't released an official comment on the doctor or the investigation.
Prosecutors have until Tuesday to file charges.