LINCOLN, Neb. -- A 19-year-old man, who was convicted of killing Lincoln Police Investigator Mario Herrera in 2020, is now charged with murdering another man several months earlier. 

According to officials, Felipe Vasquez is currently serving a life sentence but was charged with new charges on Thursday. Vazquez was charged with first-degree murder, second-degree assault, and two counts of use of a deadly to commit a felony for the killing of Edward Varejcka on March 8, 2020.

Authorities said Lincoln Police Investigator Mario Herrera was serving a search warrant on Vazquez in September 2020 when Herrera was shot by Vazquez. The warrant was in connection to the Varejcka case and was for second-degree assault.