Dark Arts

<p>In June, a three-story brick twin on a quiet residential street in Olney became the center of a sprawling investigation into the disappearance of at least two women.</p><p><br></p><p>The property, owned by Raymond “R.C.” Horsch, has been scoured by hazmat teams and excavation crews looking for clues. Still, key questions remain, and other developments have raised concern about the fates of the missing women.</p><p><br></p><p>An Inquirer review of court records and other documents traces the people and events connected to the home, along with dozens of interviews.</p><p><b...