WASHINGTON ― Justice Department prosecutor Jennifer Kerkhoff carried the cardboard evidence box past the jury and placed it next to Officer Andre Reid, the 14-year veteran of the D.C. Metropolitan Police Department seated in the witness stand. Snapping on blue medical gloves inside this downtown courtroom, she took out a JanSport backpack ― the government’s exhibit number 43 ― and began removing its contents: two sharpies, a pencil, a pen, a Florida driver’s license, green goggles, a black bandana, black gloves, sunglasses, an energy drink, a phone charger with a cord, and a black hat. As jurors looked on, Kerkhoff and Reid examined a mask. “Have you ever heard of the term ‘balaclava’?” Kerkhoff asked? Reid hadn’t. He called it a ski mask. They took a look at a plastic bag containing two bandanas soaked in some mysterious “solution” that had a smell to it. “Can you smell that now?” Kerkhoff asked. Reid could. The JanSport in question belongs to Michelle Macchio, a 26-year-old from Naples who hasn’t had possession of the bag or its contents in nearly 11 months, ever since she was caught up in a mass arrest during a protest just before President Donald Trump was sworn in as the 45th president of the United States.