Dead-eyed Colorado teenager is jailed for 40 years for burning baby, toddler and three adults alive in their home in horrific case of mistaken identity - with dad who lost wife and kids insisting quadruple-killer should be EXECUTED

A Colorado teenager has been jailed for 40 years for burning a baby, toddler and three adults alive in their home in a horrific arson attack. 

Gavin Seymour, now 19, was 16 when he started a house fire that killed five Senegalese family members in Green Valley Ranch, Denver on August 5, 2020. 

He pleaded guilty to second degree murder and was given the maximum sentence he could face in Denver District Court on Friday. 

Investigators said the attack was a case of mistaken identity in a drug trafficking scheme gone wrong. A man, woman and child were able to survive the blaze by jumping from a second story window.

Amadou Beye, who lost his wife Hassan Diol and six-month-old daughter Hawa, called for Seymour to be executed for his crimes and told KDVR: 'This is not justice. If I could get death penalty or life sentence that is what would be justice.'

Colorado teenager Gavin Seymour has been jailed for 40 years for burning a baby, toddler and three adults alive in their home in a horrific arson attack

The 19-year-old was 16 when he started a house fire that killed five Senegalese family members in Green Valley Ranch, Denver on August 5, 2020 

He pleaded guilty to second degree murder of the five Senegalese family members (pictured) and was given maximum possible sentence he could face in Denver District Court on Friday

Amadou Beye, who lost his wife Hassan Diol and six-month-old daughter Hawa, called for Seymour to be executed for his crimes

Also killed in the fire were Hassan Diol’s brother, Djibril, his wife, Adja Diol and their 22-month-old daughter Khadija. Their bodies were found on the first floor of the home near the front door. 

Seymour, who was charged alongside teenagers Kevin Bui and Dillon Siebert, 19, was sentenced to 40 years in prison as well as five years of mandatory parole.

Judge Karen Brody said: 'This is a tragedy that is, I’m sure for everyone involved, incomprehensible. There was a loss of the most innocent of lives.'

Seymour apologized in court on Friday and said: 'If I could go back and prevent all this I would.

'There is not a moment that goes by that I don’t feel extreme guilt and remorse for my actions. …I want to say how truly sorry I am to the family members and community for all the harm I’ve done.'

Beye addressed Seymour in court and said: 'I hope when you die you will die slow and hard.

'And you will die young. And when you die, I hope you will feel all the pain they did feel when they were dying. And you will feel all the pain that we feel right now.'

Hanady Diol, who lost his son Djibril and daughter Hassan in the blaze said he thought about killing himself after their deaths. 

'Even if you kill five sheep or goats, you should get a maximum sentence,' he told the court. 

'This person here, they are talking about 40 or 30 years. That just means there is no justice there. There is no judging that the people who died are human beings.'

Also killed in the fire were Hassan Diol’s brother, Djibril (right), his wife, Adja Diol (left) and their 22-month-old daughter Khadija

Hanady Diol, who lost his son Djibril and daughter Hassan in the blaze said he thought about killing himself after their deaths

Old bouquets, stuffed animals and other remembrances hanging on the fence surrounding the family's burnt down home 

Kevin Bui's has also been charged for his involvement in the murders and his trial is set to be heard next week 

Siebert, who was 14 at the time of the arson, was sentenced in February 2023 to ten years behind bars for his role in the crime.

Bui's trial is set to be heard next week and he faces charges including first-degree murder extreme indifference, attempted murder with extreme indifference, burglary and assault with a deadly weapon.

Denver police Detective Neil Baker told the court: 'This is by far the worst, most senseless murder investigation I have ever investigated.

'I can’t think of any other one that is more deserving of a maximum sentence allowed… There are five victims. Two were babies.'