The former UN official was brought in to lead Haiti through an ongoing, gang-led security crisis.

In the wake of another two teenagers being jailed over a stabbing, we talk to those impacted by youth violence.

A man is convicted of attempted murder after targeting gang rivals following a funeral in Birmingham.

Children in year six also learn about online safety, hate crime, rail safety and substance abuse.

Gangs may be behind the recent attacks but Sweden believes Iran has had a hand in them.

Genaro García Luna is the highest-ranking Mexican official ever to be convicted in the US.

Daniel Laponder, member of the Mad Dogs Motorcycle Club, planted a pipe bomb in a feud with a rival gang.

The BBC finds gang warfare in jails is rife, and lack of space makes it difficult to keep rivals apart.