https://www.bbc.co.uk/news/topics/c12kgl2e4g6t/knife-crime this is a bbc vidio
"I started carrying a knife when I was 12 because everyone was doing it at the time.
"To fit in more you had to do certain things so I started to stab people. I didn't do it because I wanted to be bad."
Robert Bragg was once heavily involved in the world of knife crime.
The 26-year-old served six years in prison for a range of gang-related crime and tells Radio 1 Newsbeat he believes tougher sentences would have encouraged him to change his ways a lot earlier.
He's now part of a programme to encourage school children not to get involved with knife crime.
"I did it because I wanted the older lot to like me and because I thought it was the right thing to do at the time.
"To be honest with you, I've stabbed quite a lot of people.
"If I was to sit here and count I wouldn't be able to. People remind me, to this day, about people I've stabbed that I don't remember.
"We wanted to be bad - look bad, become the gang that everyone feared. We had to carry out a lot of violent crimes to become that gang.
"Giving tougher sentences will prevent people from carrying knives because nobody wants to go to jail for 10 or 15 years just for carrying a knife."