A California Department of Corrections and Rehabilitation employee is under investigation after she was filmed ridiculing a Bay Area Muslim man who was praying in a park, and then threw an umbrella and coffee at the man, authorities said.

Denise Slader, a program technician with the department’s Adult Parole Operations, was reportedly filmed interrupting a prayer service about 3 p.m. Sunday at Lake Chabot in Castro Valley, officials said.

Rasheed Albeshari, 31, and his friends were playing volleyball and praying at the park — a Sunday ritual for the three friends.

This time, it was different. Slader reportedly approached them and began “talking … trash,” mostly about religion, Albeshari said. That’s when Albeshari said he decided to take out his cellphone and record the encounter with Slader. He later posted the video on Facebook.

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