Donna Delbono, 42, has bravely shared that she stands by her decision to turn in her son Joshua Delbono, 19, to the police for murdering 16-year-old Charley Bates.
Last July, Joshua fatally stabbed Charley in a pub car park in Radstock, Somerset, over a £20 debt.
Despite the pain of the situation, Donna says she has no regrets about her choice to do the right thing.
In an interview with the Daily Mail, Donna, a mother of seven, has revealed that she had to make "the toughest decision any parent would ever have to make."
She said: "I was brought up to know the difference between right and wrong, and to always try to do the right thing in life, no matter how hard it is. Even though it was such a tough choice to make, I know I'd do the same again."
"I couldn't have lived with myself if I'd chosen instead not to call the police. I feel terrible that Charley Bates lost his life and my sympathies go out to his family."
During the trial at Bristol Crown Court, Donna's call to the police was played, and it was undoubtedly a difficult one to hear.
On the call, she can be heard saying: "My son has killed someone. It happened earlier in Radstock. He's just come back, and I've found out. He's in my house now, but I can't let him go anywhere."
The operator on the other end of the line asked Donna if her son was aware that the call was being recorded, to which she replied: "Yeah, he's here. I've told him I've got to do it."
Upon returning from a night out with friends, Joshua confessed everything to Donna. He was feeling scared and lost and didn't know what to do. However, Donna stated that: "There was only one thing he could do – hand himself in to the police."
"But he said he was too terrified, so I said if he wouldn't call them, I would. He just nodded. So, I grabbed my phone and dialled 999."
She concluded: "My son will have to live with this for the rest of his life."
According to reports, a fight between two groups led to the death of Charley Bates, who was fatally stabbed by Joshua Delbono with a wound to his chest and arm.
Charley passed away 30 minutes later.
On Tuesday, Joshua was convicted of murder and sentenced to life imprisonment, with a minimum term of 21 years.