FORT LAUDERDALE, Fla. — A Miami man accused of helping rapper YNW Melly tamper with witnesses in his murder trial was found guilty Tuesday of committing an unrelated murder a year earlier. Terrence Mathis, 40, was convicted of second-degree murder in the 2017 shooting death of liquor store owner Karl Wolfer in a botched robbery outside the victim’s Lighthouse Point home. Defense lawyers tried ...