Facebook The cause of death of a New York father and his 2-year-old son has been determined nine months after they were found dead in their apartment, officials said. David Conte, Sr., who died in February, had been suffering from “cardiovascular disease,” the Ontario County Sheriff’s Office announced earlier this week, according to NBC News. David Conte, Jr., later died of starvation, police added. His death was ruled an accident. “It is believed that Mr Conte died first and the child was unable to receive any food after the death of his father,” police said, according to the agency. The bodies of the father and son were found in their apartment in Geneva, New York on February 15. They were last seen alive on January 22, NBC News reported. RELATED: Body of missing father visiting Houston for 13-month-old son’s liver transplant found in Bayou The Ontario County Sheriff’s Office did not immediately respond to PEOPLE’s request for comment. Officers were called to Serenity Manor Apartments in February after David Sr. he had not been in contact with anyone for over a week, the Democrat & Chronicle reported. When officers arrived at the complex, they noticed the door was locked. Officers were forced to break into the flat after an employee was unable to open the door due to the bolt being locked. RELATED: 6 dead after two planes collide mid-air during Dallas Air Show Although the apartment appeared intact, Ontario County Lt. David Cirencione said it was cold and the heat was not on, according to the Democrat & Chronicle. Deputies found the father in bed, while his son was found nearby. “There were no signs of a struggle at the residence,” Cirencione said at the time. “We have no reason to believe that anyone else was in the apartment when these two died.” RELATED VIDEO: Man Appearing to Dance on Top of 18-Wheeler Dies When He Goes Under Houston Freeway Overpass “We honestly don’t know what caused their death at this time,” he added, noting there were no signs of trauma. The story continues “We want to do everything we can to get answers for the family so they can get closure,” Cirencione said, according to the Democrat & Chronicle. “It was a very difficult scene for us to work on, for all the first responders that had to go there. This is not something we see every day. It’s not pleasant. It was a very disturbing scene.” David, Sr. she had custody of the toddler for much of his life, Cirencione said. He said the child’s mother was not active in his life. Authorities said it was David Sr.’s family who called police after they hadn’t spoken to him in days, Rochester ABC affiliate WHAM reported. According to David Jr.’s obituary, he was born with a medical condition and only “recently learned to walk, after multiple surgeries and months of casts and rehabilitation.” David, Jr. is described as “a handsome little boy with curly locks, who had a determined smile and a sweet disposition.”