The Daily News reports 28-year-old Marcus Gilliam filed the lawsuit against the city, two police unions and several officers.
Gilliam was taken into custody last June and questioned for hours. The police and detectives unions claimed on social media the cops were given milkshakes with bleach.
The NYPD later said nothing criminal happened.
Sources previously told CBS2 it appeared the incident was an accident, possibly the result of cleaning solution not properly removed from the shake machine.
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