The investigation into the Warsaw murders involving a plumber and two Ukrainian nationals is a significant case that could become Poland's worst serial murder investigation.

The two names in the indictment Most headlines about the Warsaw murders lead with the plumber. The indictment has three names. Next to Michał P., 43, charged with killing six elderly women, are two Ukrainian nationals, Igor H. and Taras H., charged as accomplices in four of the murders. Investigators describe a repeated scheme. The plumber gained entry and trust through repair jobs, and the later visits ended with robbery, restraint and suffocation.

Three suspects, one method The Warsaw case that police say could become Poland's worst serial murder investigation now has three defendants. Plumber Michał P., 43, is charged with killing six elderly women, and two Ukrainian nationals, Igor H. and Taras H., are charged as his accomplices in four of those murders. Their alleged roles explain how the scheme worked. The plumber had a legitimate reason to enter apartments and earn trust. Investigators say the later visits, with robbery