A Missouri woman pleaded guilty this morning to fatally shooting her cousin at an Upper St. Clair home last month. "I truly am sorry for everything that happened, and I wish it wouldn't have happened," Stephanie Munizza, 28, told Judge Jeffrey A. Manning of the Allegheny County Common Pleas Court. Ms. Munizza pleaded guilty to involuntary manslaughter, a misdemeanor, and the Allegheny County District Attorney's Office withdrew a felony count of third-degree murder. She was in Pittsburgh visiting family when, on Nov. 1, she and her cousin, Joshua Poremski, were drinking and talking about Ms. Munizza possibly getting a concealed...