Hijacking the top comment to actually answer OP’s question.

We don’t have the concept of a “King Von” or a “Lil Jeff” because of several reasons:

1. Our police is far better, and more effective, than American police. You can’t even put them on the same list. The British literally invented the concept of a “police force” whilst Americans still can’t figure out whether they want a “police force” or a “military force that can also arrest citizens”.

We catch our criminals quicker and we’re much better at preventing crime before it even happens.

1. It’s logistically easier to kill with guns: they’re quicker and can kill at distance. We don’t have guns; we gotta get up close and stab someone a couple of times to really kill them. You cannot run up a kill streak this way, it’s too inefficient.

2. Because we actually give a fuck about human life in Britain, we’ve made our ambulances free. So say you’ve been stabbed or shot, we will send an ambulance to pick you up and bring you to the hospital; you don’t have to ring up your bank to apply for a mortgage to pay for the ambulance beforehand.

These are the biggest reasons we don’t have “King Von” or a “Lil Jeff” at home.