Fermín Arévalo was a Mexican drug trafficker based in Ojinaga.
In 1953, when a young Pablo Acosta was arrested by the Mexican police for trying to cross into the United States having heroin duct taped into his arms; Fermín bribed the police to release Acosta, saying that he shouldn't go to jail for smuggling just 12 ounces. Acosta grew to be one of the most powerful smugglers in Mexico; and they both worked together.
In 1986, Acosta began to suspect that Fermín's son Lili was stealing from him. Without Pablo's permission, his lieutenant Marco de Haro killed Lili. In retaliation for Lili's murder, Fermín sent a sicario after Acosta, but Acosta escaped the attempt on his life. Enraged, Acosta, de Haro and Amado Carrillo Fuentes storm to Fermín's house to confront him. Fermín hid inside the house, and sent his wife Antonia to talk to him. Antonia tells him that her husband isn't inside the house, and Acosta gives her his pistol and gave her permission to take his life, but she refused.
Fermín gathered his men and ambushed Acosta as he returned home, but was unaware that Acosta expected the ambush. Fermín manages to fire at Acosta with his assault rifle, critically wounding him, but is killed by Carrillo Fuentes before he got a chance to kill Acosta.