The FBI’s arrest of 12 suspected members of the notorious Wah Ching gang resulted from a successful effort to develop informants within its ranks, according to a court document.

Johnny Chang, 34, was recruited into the Wah Ching gang aged just 12 and spent more than a decade in and out of prison. 7 Johnny Chang is an ex gangster from Los Angeles ...

Johnny Chang, 34, was recruited into the Wah Ching gang aged just 12 and spent more than a decade in and out of prison. 7 Johnny Chang is an ex gangster from Los Angeles ...