2015 Tanhuato–Ecuandureo shootout

On May 22, 2015, a three-hour shootout broke out between the Mexican Federal Police and alleged members of the Jalisco New Generation Cartel (CJNG) in Ecuandureo, Michoacán, leaving 43 dead. One of the fatalities was a Federal Police officer, while the others were suspected to be organized crime members. The confrontation started when the Federal Police spotted a suspicious vehicle on a highway in Tanhuato, Michoacán. The authorities had received information that one of the properties in the area had been overrun by criminals. Unconfirmed reports suggested that the CJNG leader Nemesio Oseguera Cervantes (alias "El Mencho") was in the area. When they tried to pull over the vehicle, however, the men onboard opened fire at the police units. A vehicle chase ensued and the security forces made their way into a large, rural property where the shootout intensified. The Federal Police then called for ground and air reinforcements and neutralized the situation.

The shootout is widely regarded as one of the bloodiest incidents in the ongoing Mexican Drug War, which to date has taken the lives of tens of thousands in Mexico. According to the government, the shootout was one-sided because the security forces were better trained and equipped than the gangsters. Critics, however, believed that there was a possibility that the incident was an extrajudicial mass murder. The Federal Police conducted tests at the crime scene and confirmed that the gunmen fired at the security forces and were shot from a distance. Mexico's National Human Rights Commission concluded their investigation in 2016 and stated that the Federal Police extrajudicially killed at least 22 of the 42 men. The police denies these findings.