Walter is Vice President of Criminal Justice at Arnold Ventures which he joined in 2020 after more than two decades in public service, beginning with a 17-year tenure as a public defender in Southern California through his 2017 appointment as Deputy Chief of Staff for Public Safety in the administration of Chicago Mayor Rahm Emanuel. At the Mayor’s Office, Walter oversaw one of the most complex police reform efforts in the United States, served as a co-negotiator of the consent decree that was enacted in 2019, and led violence reduction efforts. Immediately before coming to Arnold Ventures, Walter was the Director of Professional Services at a GovTech startup. Walter has an extensive background in law enforcement accountability and oversight. Prior to returning to his birthplace of Chicago, he served as the Independent Police Auditor for San Jose, California following his appointment by the City Council in 2015. He also served as Deputy Inspector General for the County of Los Angeles Office of Inspector General (OIG) that oversees the Los Angeles County Sheriff’s Department (LASD).