WICHITA, Kan. (KSNW) - The City of Wichita's ethics officer, Kathy Sexton, said investigating an ethics complaint against Mayor Lily Wu will take weeks. The complaint from the fire union alleges Wu met with Wichita Fire Chief Tammy Snow and told her to lay off 42 employees. It claims the mayor used improper influence and instruction on Snow, violating the city's ethics code. Wichita mayor responds to firefighters’ union accusation Once her investigation is complete, Sexton will present the findings to the ethics board. She said she received Wu's response to the complaint filed by the fire union. The mayor denies the accusations.