Action News has learned that officer, Lt. Jonathan Josey, will be fired on Thursday afternoon.
This comes as the Philadelphia District Attorney's Office said it intends to drop the charge against a woman was struck.
Aida Gusman, 39, was originally charged with a summary offense for disorderly conduct.
The video of the incident at 5th and Lehigh during a Puerto Rican Day Parade after-party on Sunday quickly went viral.
A number of officers had gathered at the scene for a traffic stop.
Earlier in the video, Gusman is seen spraying silly string in the air, but never striking any officer. Police contended that she threw beer at the officers.
A few seconds later someone lobs a liquid from behind Gusman at the officers, prompting the violent reaction from Lt. Josey, a 19 year veteran and highly decorated officer.
Commissioner Charles Ramsey says Lt. Josey has had 13 other complaints filed against him during the course of his career, two of those sustained.