A cult-like drug cartel that challenged a rival gang by rolling five severed heads onto a disco dance floor in western Mexico was so divided and cash-strapped of late that it sought to form an alliance with that gang, police officials said Wednesday.La Familia gang leader Jose de Jesus Mendez Vargas was looking for support from the Zetas drug gang to fight splinter cells within his own organization, said Federal Police anti-narcotics chief Ramon Pequeno.Mendez Vargas, alias El Chango, or The Monkey, was arrested Tuesday in the central state of...