Col. Alberto Julio Candiotti, a former Argentinian military officer who was wanted for crimes committed during the country's 1976-1983 "Dirty War," was arrested May 23 in Montevideo, Uruguay. Information for the whereabouts of the 68-year-old, who was residing in the city with his wife, was valued at 100,000 pesos (USD $20,000). The former officer was arrested by Uruguay's National Police. Authorities are currently uncertain whether Candiotti sneaked into the country or falsified documents to gain admittance.

US President Barack Obama delivered a speech May 23 on US counterterrorism policy and efforts, outlining plans to restrict the use of unmanned drone strikes and to renew efforts to close the detention center at Guantánamo Bay. In Obama's first major speech on counterterrorism since his re-election, he said: "Our systematic effort to dismantle terrorist organizations must continue, but this war, like all wars, must end. That's what history advises. That's what our democracy demands." But rather than introduce new sweeping policies, Obama's speech reaffirmed his national security priorities.

Chaudhry Zulfikar, chief prosecutor in the criminal case against Pakistan's former president Pervez Musharraf, was shot and killed in a drive-by shooting on May 3. Zulfikar had been due to appear at the High Court in Rawalpindi for a hearing in Musharraf's case on charges of involvement in the assassination of former prime minister Benazir Bhutto in 2007. Zulfikar was leading the investigation into the allegations that Musharraf failed to provide adequate security to Bhutto when she returned to Pakistan after eight years of self-imposed exile in December of 2007. She was killed at a campaign rally in Rawalpindi later that month.

US President Barack Obama on April 30 renewed his pledge to make an effort to close the detention center at Guantánamo Bay. At a news conference, Obama was asked about the ongoing hunger strike, now involving 100 of the 166 detainees. He responded, "Well, it is not a surprise to me that we've got problems in Guantánamo, which is why when I was campaigning in 2007 and 2008, and when I was elected in 2008, I said we need to close Guantánamo. I continue to believe that we've got to close Guantánamo." He went on to say:

Deputy commander of the JEM-Bashar rebel faction and international war crimes suspect Saleh Mohammed Jerbo Jamus has reportedly been killed in Northern Darfur. The group reported his death on April 22, which was later confirmed by his defense team. Jamus was charged in connection with an attack on African Union peacekeepers in September 2007 at Haskanita, which resulted in the death of 12 peacekeepers. He was charged with three war crimes: violence to life and attempted violence to life; intentionally directing attacks against personnel, installations, material, units and vehicles involved in a peacekeeping mission; and pillaging. His hearing was scheduled to begin in May.

The US Supreme Court ruled unanimously April 17 in Kiobel v. Royal Dutch Petroleum that nothing in the Alien Tort Statute of 1789 (ATS) rebuts the US presumption against extraterritoriality and that suits challenging torture and international law violations that took place overseas cannot be brought in US Court. Chief Justice John Roberts authored the majority opinion. Kiobel was held over from last term when the court decided that the parties should brief on the circumstance when the ATS should apply extraterritorially. In the new ruling the court held that extraterritorial disputes—those concerning foreign actors that violate treaties to which the US is a party—cannot be litigated in the US under the ATS, and "sufficient force" is necessary to displace that presumption. The opinion also suggested that "mere corporate presence" will not suffice to bring suit in the US:

US authorities have engaged in the torture of detainees, and the nation's "highest officials" bear some of the responsibility, according to a report (PDF) released on April 16 by the Constitution Project, a bipartisan legal advocacy and watchdog group. The Project's Task Force on Detainee Treatment was established after US President Barack Obama announced in 2009 that he opposed a proposal by Senate Judiciary Committee Chairman Patrick Leahy to set up a "truth commission" to investigate controversial actions of the Bush administration, including justifications for the Iraq war, warrantless wiretapping and detainee treatment. The task force members reached their conclusions after a two-year process, which included examination of public records and interviews with former detainees, military and intelligence officers, interrogators, and policymakers.

Al-Shabaab radicals launched an assault on April 14 against Somalia's Supreme Court. The attack, resulting in at least 35 deaths, was one of the worst attacks in years for the country's capital of Mogadishu. According to the Somali government, nine men were involved in the attack against the court, six of whom detonated explosive vests. Al-Shabab retained control over most of Somalia's capital before Somali forces and the African Union forced the militants out of Mogadishu in 2011. Since being forced out of the capital, al-Shabaab has carried out a series of bomb attack in the city, with the new coordinated attack amounting to the largest one since 2011. The Somali government reported that all of the attackers died, with some killed by security forces.