SEIDO

{{Infobox law enforcement agency

| agencyname = Deputy Attorney Specialized Investigation of Organized Crime

| nativename = Subprocuraduría Especializada en investigación de Delincuencia Organizada

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| abbreviation = SEIDO

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| logo = File:SEIDO.jpg

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| preceding1 = Fiscalia Especializada para la Atencion a Delitos Contra la Salud (FEADS)

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| country = Mexico

| federal = Yes

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| parentagency = Attorney General of México

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| website = http://www.pgr.gob.mx/Paginas/default.aspx

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{{langx|es|label=none|italics=none|Subprocuraduría Especializada en Investigación de Delincuencia Organizada|lit=Assistant Attorney General's Office for Special Investigations on Organized Crime}}(SEIDO), is the organized crime division of Mexico's Office of the Attorney General.

In October 2012, the organization changed its name from SIEDO to SEIDO.{{cite news|last=Mosso|first=Ruben|title=Se convierte SIEDO en SEIDO|url=http://www.milenio.com/cdb/doc/noticias2011/c196e3ff83274045e678264f36c91ba5|archive-url=https://archive.today/20130411091149/http://www.milenio.com/cdb/doc/noticias2011/c196e3ff83274045e678264f36c91ba5|url-status=dead|archive-date=11 April 2013|access-date=17 July 2013|newspaper=Milenio|date=17 October 2012|language=Spanish}}