Lachman was given a Raven Award from the Mystery Writers of America in 1997, for his fan-related activities. MWAs Raven is a "special award given for outstanding achievement in the mystery field outside the realm of creative writing." In 2001 he received the first Don Sandstrom Memorial Award for Lifetime Achievement in Mystery Fandom. In 2013 the Bouchercon Board of Directors gave him the David Thompson Special Service Award for his "exemplary life-long service to the mystery and crime fiction community." In 2019 Marv is attending his fortieth Bouchercon.
The first edition of The Heirs of Anthony Boucher (2005) won the Anthony Award at Bouchercon in 2006. Marvs most recent book was The Villainous Stage (2014), a history of crime plays in New York and London. He lives in Santa Fe, New Mexico, with his wife, Carol.