Heriberto Seda is an American serial killer who struck New York City from 1990 to 1993. Before being caught on June 18, 1996 Seda killed three people and wounded five others (four critically). Seda is believed to have admired San Francisco's Zodiac Killer for avoiding capture. Police described Seda, a Brooklyn resident, as a recluse obsessed with astrology and death. Seda was formally charged in the case on June 21, 1996, convicted in 1998, and sentenced to 232 years imprisonment.

Brief one page handwritten letter. Letter is an introductory letter with general content. Original matching handwritten envelope which is signed twice, once on the front and once on the back, is included.