All academic psychologists who conduct experimental research on human subjects may be at risk from this killer. Given that Margarethe Schilling told her partner she was scheduled to meet a journalist representing a new psychology e-zine, it may be advisable to ask psychology lecturers to contact this investigation if they receive such an approach. However, it is clear that this poses potential problems. If the killer has links to the academic community, he may be privy to any such warning and alter his strategy accordingly. Furthermore, such a warning may provoke a panic response among those at risk. There is also the difficulty of the scale of the operation. The killer has already operated in two EU countries that we are aware of – Germany and Holland. There is no reason to suppose that this is the limit of his range.

What do we know of the killer from his actions so far?