SACRAMENTO — Donald “Popeye” Mazza, the co-founder and onetime leader of a Southern California skinhead gang known as Public Enemy Number One, or PEN1, has pleaded guilty to federal ...

In 2016, Donald “Popeye” Mazza communicated with a jailed leader of the Aryan Brotherhood prison gang, who arranged for Mazza to murder a fellow gang member suspected of being an FBI informant ...