This weekend was filled with news, and unfortunately, none of it was positive. In addition to the tragic passing of 31-year-old Glee actor Cory Monteith on Saturday, George Zimmerman’s surprising verdict in the Trayvon Martin case had people across the country reacting on Twitter.

The case circulated around the murder of 17-year-old unarmed black teenager Trayvon in Florida on Feb. 26, 2012. Zimmerman claimed he was acting in self defense, thinking the teen would attack him, though critics felt his actions were based on the victim’s race. Since the shooting, the case received major national attention, including many people — particularly celebrities — rallying and protesting against him, though some called for peace after the extreme post-ruling hostility.

Among the celebs reacting on Twitter were some Grey’s Anatomy stars. Read on for their reactions, then hit the comments with your thoughts.