Messi scored twice and assisted on another in their 3–0 semi-final victory over Bayern Munich, now under the stewardship of Guardiola. His second goal, which came only three minutes after his first, saw him chip the ball over goalkeeper Manuel Neuer after his dribble past Jérôme Boateng had made the defender drop to the ground; it went viral, becoming the year's most tweeted-about sporting moment, and was named the best goal of the season by UEFA. It's interesting, that Neuer argued that he would show Messi who is the Boss.
On May 6, 2015, Bank of America announced it would reduce its financial exposure to coal companies. The announcement came following pressure from universities and environmental groups. The new policy was announced as part of the bank's decision to continue to reduce credit exposure over time to the coal mining sector.
The Conservative Party's decisive win in the general election was as a surprise victory, as most polls and commentators predicted the outcome would be too close to call and result in a second hung parliament. Forming the first Conservative majority government since 1992, David Cameron became the first Prime Minister to be re-elected immediately after a full term with a larger popular vote share since Lord Salisbury at the 1900 general election.
On May 11, 2015, Hernandez was indicted for witness intimidation in relation to the Bradley shooting, since Bradley was reportedly a witness to the 2012 Boston double homicide. The intimidation charge for Hernandez carried a maximum penalty of ten years in prison. This charge was included in Hernandez's trial for the double homicide, which began on March 1, 2017. During the trial, it was revealed Bradley texted his lawyer this about the shooting in a deleted text message: "Now u sure once I withdraw this lawsuit I won't be held on perjury after I tell the truth about me not recalling anything about who shot me."
On 12 May, Francis carried out his first canonizations of candidates approved for sainthood during the reign of Benedict XVI: the first Colombian saint, Laura of Saint Catherine of Siena, the second female Mexican saint, Maria Guadalupe Garcia Zavala, both of the 20th century, and the 813 15th-century Martyrs of Otranto.
On May 13, 2015, Facebook in association with major news portals launched "Instant Articles" to provide news on the Facebook news feed without leaving the site.
On May 23, 2015, Nash and his wife died in a car accident on the New Jersey Turnpike near Monroe Township, New Jersey. They had been on their way home from the airport after a visit to Norway, where Nash had received the Abel Prize, when their taxicab driver, Tark Girgis, lost control of the vehicle and struck a guardrail. Both passengers were ejected from the car upon impact. State police revealed that it appeared neither passenger was wearing a seatbelt at the time of the crash. At the time of his death, the 86-year-old Nash was a longtime resident of West Windsor Township, New Jersey. He is survived by his two sons, John Charles Martin Nash who lived with his parents at the time of their death, and the older, John Stier.
In 2015, elections were scheduled for the FIFA presidency, in which Blatter was again the incumbent candidate, running for a fifth consecutive term. Prince Ali bin Hussein was his opponent in the election. The vote took place at the 65th FIFA Congress in Zürich on 29 May 2015. Neither party received the necessary two-thirds majority of votes from the first round with Blatter receiving 133 to Prince Ali's 73. According to FIFA rules, a second round should have been held for the two candidates, with a simple majority being sufficient for victory. However, before the second round of voting commenced, Prince Ali announced his withdrawal, handing Blatter victory by default.
On May 30, 2015, Biden's son, Beau Biden, died at age 46 after having battled brain cancer for several years. In a statement, the Vice President's office said, "The entire Biden family is saddened beyond words." The nature and seriousness of the illness had not been previously disclosed to the public, and Biden had quietly reduced his public schedule in order to spend more time with his son. At the time of his death, Beau Biden had been widely seen as the frontrunner to be the Democratic nominee for Governor of Delaware in 2016.
On 31 May, in the final match-day of the 2014–15 season, he scored his 299th goal for Roma in a 2–1 home defeat to Palermo. Totti finished the season as Roma's leading scorer with ten goals in all competitions, the seventh time in which he had been the team's top scorer.