Robert Bowers
Robert Bowers PIttsburgh Police Department

Tree of Life Synagogue shooting suspect Robert Bowers was arraigned in federal court Monday and pleaded not guilty to new hate crimes charges, a Justice Department spokeswoman was quoted saying by CNN.

Prosecutors say Bowers used anti-Semitic slurs and criticized Jews on social media days before he killed 11 people last year in Pittsburgh.

    Bowers pleaded not guilty in November to original charges.

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