Mavericks assistant coach Darrell Armstrong was arrested Saturday on a charge of aggravated assault after allegedly hitting his girlfriend with a gun. Dallas police responded to a call at about 3:45 a.m. Saturday in the 1000 block of Ross Avenue. According to police, Armstrong was involved in an argument before he allegedly struck the victim with a gun and threatened to shoot her. In other news, a new political group opposed to President Donald Trump is organizing protests across the nation, including one today at Dallas’ City Hall. 50501 is planning “Not My President’s Day” protests at state capitols and city halls nationwide today. The protest in Dallas will be held at City Hall at noon; Texas’ largest teacher preparation program made enough progress to come off probation after years of scrutiny, allowing it to continue operation, state officials determined Friday; And as you plan to trim trees and clear the yard, the Dallas Zoo is asking you to consider donating your leafy twigs and branches. The Browse Program at the Dallas Zoo is accepting recently trimmed or felled landscaping to help feed and enrich its animals, from the towering African elephant to the spectacled dusky leaf monkey.

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