DEMING, N.M.—New Mexico was in mourning Friday over the shooting death of a State Police officer in a highway-stop confrontation linked by authorities to drug trafficking that touched off a 40-mile police chase. Officials say the attacker was killed in a shootout with police at Las Cruces, where another officer was wounded. The officer killed Thursday was identified as Darian Jarrott, who joined the State Police in 2015 after previously working as state transportation inspector and local law enforcement officer. The attacker was identified by authorities as Omar Felix Cueva, 39. Jarrott, who was assisting U.S. Homeland Security Investigations on Thursday, made the traffic stop on Interstate 10 in southern Luna County between the cities of Las Cruces and Deming in New Mexico, a state police statement said. A Homeland Security agent who arrived at the initial shooting scene notified the state police. After a state police officer spotted Cueva’s …