The Terror on Dark Street

Thomas Bonsell's neighbor heard an argument going on in Bonsell's apartment and now Bonsell has disappeared. The Dark Street area had recently been the site of several disappearances and Frank is called in to work the case. Meanwhile, a cabdriver has spotted a stolen taxi next to the Whitehill Cemetery. After he leaves a man takes a body out of the car and heads into the burial ground. Are the two related?