Growing up in a household that seemed "as generic as midwestern Jews get," Eric Konigsberg never imagined there was anything remotely mysterious about his family—until he learned from an ex-cop groundskeeper that his great-uncle Harold "Kayo" Konigsberg had been a legendary Mafia enforcer, suspected by the F.B.I. of upwards of twenty murders.In Blood Relation, Eric Konigsberg unspools the lurid rise and protracted flight from justice of his notorious "Uncle Heshy," revealing Kayo as a fascinating, paradoxical character: a cold-blooded killer and larger-than-life con artist, both brutal and seductive. In the process, the author investigates Kayo's impact on his family and others who crossed his path, brilliantly interweaving themes of Jewish identity, family dynamics, justice, and postwar American history.