Jimmy Hayes’ autopsy results came in inconclusive, leaving the cause of death a mystery. Countless questions remain. Fans have mentioned Covid-19, heart problems and drugs as possibilities. But none of those causes have been discussed by the hockey player’s family.

Passing away unexpectedly, Jimmy Hayes’ death is still a medical mystery to the public. According to officers, first responders arrived at his home Monday morning in Milton, Mass., a suburb of Boston, where he was pronounced dead.

A spokesman for the Massachusetts medical examiner’s office told The New York Post today that toxicology testing could take up to several weeks to process and may help determine the cause of death. It is not unusual for the autopsy report to be inconclusive as pathologist wait for the toxicology results, according to medical professionals.

In cases of homicide, suicide, overdose, or accidental deaths, much of what goes into the cause of death lies in intent. Law enforcement told The Boston Globe that his death was not considered suspicious, and the pathologist did not report anything that would lead investigators to believe that it was a homicide or self-inflicted wound, leaving the cause of death as “undetermined” until the toxicology results are made available. Due to lack of knowledge surrounding possible intent or accident, many heart attacks are even listed as “undetermined.”

Once the toxicology report comes in, the medical examiner will review the case, as well as the undetermined cause of death, and release a final death certificate. If questions still remain unanswered, the cause of death will be listed as “pending.”

Just this past weekend, Jimmy Hayes’ wife Kristen posted on Instagram that they were celebrating the 2nd birthday of their son Beau with family and friends. Jimmy was reportedly healthy, and went to the arcade with the family just the night before, seen smiling in a Patriots hat, along with his son other son, Mac, born just three months ago.

Posting a devastating tribute on her Instagram page titled “My Angel,” Kristen Hayes’ touching words were posted alongside a photo of Jimmy holding his two boys on the beach. She followed with another post this morning, writing, “On Wednesday we took family photos. Little did I know they would be our last photos of a family of four.”

“I have no words,” she said. “I’m heartbroken. We miss you. We love you. You should be here.”

Jimmy’s brother Kevin, who also played hockey in the NHL, wrote his first message regarding Jimmy’s death on Instagram, stating: “Yesterday I lost my best friend, my brother. My whole life it has always been Jimmy and Kevin or the Hayes brothers. I have followed you around since I can remember and I wouldn’t want it any other way.”

“You paved the way for me. You taught me everything I needed to know in order to succeed. You lit up every single room you walked into with your smile and positive attitude,” Kevin continued. “Everyone wanted to be around Jim, the big, goofy, horrible dancer, funny, genuine and kindest person around. I will never forget the times we shared or the memories we made and know that I will try my hardest to have your legacy live on. Our world lost someone special and I don’t know if I will ever be the same but till we meet again, I LOVE YOU JIM!”