A prosecutor in Washington D.C. is being accused of “manipulating evidence” to strengthen criminal cases against demonstrators who years ago protested against former President Donald Trump. The Washington Post reports that prosecutor Jennifer Kerkhoff Muyskens is being accused of working with Washington D.C. Police Detective Greggory Pemberton of deceptively editing videos of people who demonstrated at Trump’s inauguration in 2017. The allegations are being leveled by Washington D.C.’s Office of Disciplinary Counsel, which is charged with investigating complaints of prosecutorial misconduct. W…