Harrowing 911 call reveals reason for horrific murder-suicide where wealthy Utah businessman killed himself and wife at stunning $1.5m home

A harrowing 911 call has revealed what may have led to the gruesome murder-suicide of a wealthy couple in Utah.

Olin Johnson, 57, from American Fork, shot dead his 52-year-old wife, Kerilyn Johnson, at their $1.5 million home last month before turning the gun on himself.

One of the Johnson's six children was the one to find their bodies and call 911, with the eight-minute call shedding light on what led to the shocking tragedy.

The caller first says: 'I think my dad killed my mom, but then he killed himself.'

When pressed for details, he adds that 'there’s been a lot of drama recently in the household. Just within the past four days.'

'There was one instance of like a year or two ago that I think my mom...  I don’t know, my dad was chucking stuff around the house.... He had a... he went to jail for a little bit, but nothing, like, I don’t think like contact physically,' the caller tells the 911 operator.

Police have not revealed a motive for the couple's deaths.

The couple met while studying at Brigham Young University and appeared to have it all, not least their stunning family home in a pretty city north of Salt Lake City. 

Their social media pages are evidence of a life well lived, with plenty of time spent with their children, some of whom were married.

An obituary for the couple says: 'As we cope with immense sorrow, mourning the loss of Kerilyn, our beautiful mother, daughter, and sister, we also mourn for Olin, despite his actions.'

A GoFundMe has been created to help the six siblings.

The page's description reads: 'It is hoped that they would not need to shoulder the financial burden of paying for funeral expenses and other unexpected costs over the coming weeks and months.

'The love many have for this family is immense.'

Olin posted a chilling final Instagram message before he shot his wife dead and then killed himself. 

Just a day before the murder-suicide, he wrote alongside a photo: 'No matter how crappy a person I am, motorcycles always love me back. Oh and skiing. Skiing loves me too.' 

Olin could be seen wearing his helmet while sitting on his Triumph motorbike, one of his favorite hobbies.

Two of his children responded directly to their father's post.

'Your not a crappy person. Your the best dad in the world,' one of his son's, Dillon Bay, wrote.

'Love you dad and loved that you taught me to be a badass and ride motorcycles!' daughter, Savanna added.

Police rushed to the scene of the sprawling family home last month after receiving reports that two people had been shot after the bodies were discovered by another family member.

'Based on the investigation, it appears that Olin fatally shot Kerilyn before fatally shooting himself,' American Fork police said in a statement

'We're not real sure what led up to it, but he shot her twice and then shot himself, ending his life,' said American Fork Police Lt. Stuart Fore.

'Based on the investigation, it appears that Olin fatally shot Kerilyn before fatally shooting himself,' American Fork police said in a statement

'We're not real sure what led up to it, but he shot her twice and then shot himself, ending his life,' said American Fork Police Lt. Stuart Fore.

Fore also said that there were no signs of struggle or argument before the killings.