Time traveling criminals often raped and or rape each other's relatives to more rapidly be able to trace the other criminals' energy signature, especially in order to be more easily able to impersonate that other criminal, especially by using energy signature masking that makes them appear to be that other criminal.
See: Glossu Rabban Sexually Violating Francesca Jones On A Massive Scale, Moff Tarkin Sexually Violating Giselle Schroder On A Massive Scale
For a large number of the energy signatures of powerful time travelers, that can be traced through relationships in energy signature linkages to additional time traveling criminals, see: Sexual Violators Of Brad Geiger's Ancestors