"Hannah was seen for some of the time fairly close to where Morgan’s shirt was found maybe three weeks after her abduction," she told ABC NEWS. "College town, same town, same kind of look of a girl, same time of year," she said. "Is this a pattern? We know there's one predator who killed Morgan. Obviously they are not all connected, but it doesn’t seem normal. There's either some connection of a serial predator or a crime spree gone crazy."
Harrington added that the 2005 abduction and rape of a woman in Fairfax, Va., has been linked by DNA evidence to her daughter's tragic slaying.