On August 26, 2020 at 11:34 a.m., Investigator Luis "Mario" Herrera was helping serve an arrest warrant for a homicide suspect. As officers surrounded a house at N 33rd and Vine Street, the suspect and an accomplice fled from the residence through a window. The suspect fired multiple times at officers. He was captured a short distance away about an hour later. One of the suspect's bullets struck Investigator Herrera in the chest. For 12 days, Investigator Herrera courageously fought for his life until succumbing to his injuries on September 7, 2020. Investigator Herrera was 50 years old and had served as a Lincoln Police Officer for 23 years. He was survived by his wife, Carrie, and four children.