People who've killed open up on what it feels like to kill someone

A murderer, one-punch killer, a snipper, and a gangster have explained how it feels to kill someone.

One man went so far as to say it's 'a mixture of every unpleasant emotion combined'.

So, if you've ever wondered what it feels like to kill someone, here's your answer:

OFill and his friend had set out to get back at the man who he claims raped his friend's girlfriend — they hadn't meant to kill him.

However, when a struggle ensued, OFill found himself using a baseball bat against the guy.

Initially, OFill thought he'd just badly injured the man, until he saw a sheet being pulled over the body hours later.

Questioning himself, OFill remembered thinking at the time: "Is this man dead? He can't be dead. I only hit him a few times with a baseball bat in the head and around the shoulder, and neck, and wherever else."

The man was dead and OFill was jailed for 12 years - the incident left him grappling with some hard questions: "You feel bad about yourself and then you question yourself, like, am I a bad person, am I a good person? Am I wrong, am I right?"

These sentiments were shared by a one-punch killer, Jacob Dunne, who had been out for a mate's 18th birthday when they ran into a bit of trouble.

He punched a guy and he fell to the ground, an act that he and his friends had actually taken 'a little bit of pride in.'

Jacob went on with his life, going on holiday with his family, not fully realising what had just happened.

He said: "We went to Tenerife. Then a couple days later, after we come back from that holiday, the police started raiding me and all my friends' houses and this was a month after that punch.

"And then that's when it started to become a reality that someone had actually... passed away because of my actions."

The whole experience left Jacob feeling a 'mixture of every unpleasant emotion combined - shock, disbelief, self-pity'.

It also left his mum in bits: "My mum was, the best way to describe it is, hysterical. She just kept crying about the pain that the other person's mum would be feeling."

For Craig Harrison, a sniper, the experience was a little different.

The trained killer explained his first mission in Iraq, in the Maysan desert.

He said he was being scouted by a motorbike and got 'the green light to take the target out'.

He said: "I shot. Missed my first shot, second shot, I got him. And then I had to go up to the body to see if he was dead.

"And I remember walking up to the body. The motorbike, the throttle was stuck in the sand, and the bike was revving, had an AK strapped to it, and the guy was on the floor and he passed away.

"Yeah, weird, weird feeling. Weird feeling. You feel like you're in trouble. You feel, f**k, I've just killed someone.

"But people are thanking you, going, 'Oh yeah, good shot,' tapping your shoulders, 'Good shot, good mission there, Craig, well done.'

"But you've just killed someone. Strange feeling, strange feeling."

Craig has since grappled with PTSD and explained that his wife and his dog are the reason he's been able to keep going.

Bobby Cummines, a gangster, who prefers the term businessman, also has to live with having someone's life on his conscience.

Explaining a situation that went wrong and resulted in someone's death, Bobby said: "That is the hardest thing I have to live with. Someone choked on a gag on a bit of work, you know? And they choked on their vomit.

"It's a bad place for me. Like we've done a hundred times, you tie 'em up, you gag 'em, yeah? You go, the police come, untie 'em, boom. If I could undo that one, just that one, that would be the only thing in my life I would undo."

"And even to this day, I have to live with that," he added.