A federal labor board judge has found four Pittsburgh area Starbucks branches guilty of threatening, surveilling and illegally terminating employees after the opted to unionize last year.

A federal labor board judge has found four Pittsburgh-area Starbucks branches guilty of threatening, surveilling and illegally terminating employees after the opted to unionize last year.

The National Labor Relations Board has found Pittsburgh-area Starbucks shops guilty of threatening, surveilling, and illegally firing union workers since organizing efforts got underway last spring…