Allegheny County Controller Chelsa Wagner will stand trial again in Detroit next year on a felony charge of assaulting, resisting and obstructing a police officer, barring a plea deal, her defense said Friday. The decision by prosecutors to retry the case against Ms. Wagner comes exactly one month after the end of her first trial, when a Detroit jury could not reach a unanimous verdict on the felony — prompting the judge to declare a mistrial on that count. That same jury in November acquitted Ms. Wagner of misdemeanor disorderly conduct — which, like the felony, stemmed from an encounter...