The AP reported that D.C. police are investigating a suspicious substance found near Gallaudet University, and that the Ballard North Hall dorm on campus has been evacuated as a result. The Post’s Paul Duggan says both Ballard North and Ballard West have been evacuated, and the substance in question, six boxes of plant fertilizer and pesticide, plus a light bulb, was discovered in the duct work above an unoccupied room in the Ballard North building….