In October 2019, the FBI confirmed Little to be the “most prolific” serial killer in US history. The agency also said its analysts believed that all of the 93 confessions he had made until then were “credible”, and uploaded some of the confession videos on YouTube.
In October, the UK parliament passed the Early Parliamentary General Election Act that bypassed the Fixed-term Parliament Act 2011 and called a general election for 12 December.
The fourth debate was held on October 15 in Westerville, Ohio. During the debate, Yang discussed topics including impeachment, automation, the economy, taxation, foreign policy, the opioid crisis, big tech, and personal data as a property right, speaking for 8 minutes and 32 seconds, the fourth-least time of any candidate. He proposed decriminalizing opioids, a stance candidate Beto O'Rourke agreed with. Candidates Julian Castro and Tulsi Gabbard said Yang's Freedom Dividend policy "was a good idea, and something they would consider if elected president", while candidate Cory Booker argued that a $15 minimum wage was superior to UBI. Yang also spoke about the potential impeachment inquiry against Donald Trump, saying he supports impeachment, but that "we should not have illusions that impeaching Donald Trump will, one, be successful or, two, erase the problems that got him elected in 2016.
Jolie reprised the role of Maleficent in the Disney fantasy sequel Maleficent: Mistress of Evil, released on 18 October 2019, which received unfavorable reviews from critics but performed moderately well commercially, with a global gross of $490 million.
During the Asian hard court season, Kenin won one additional title in both singles and doubles. She won her third singles title of the year at the Guangzhou International Women's Open, defeating Samantha Stosur in the final. Two weeks later, she partnered with Bethanie Mattek-Sands to win her second doubles title of the year at the China Open, a Premier Mandatory event. During the event, the pair defeated the team of Aryna Sabalenka and Elise Mertens, who were ranked No. 2 and No. 3 in the world respectively at the time. This title brought her to No. 43 in the doubles rankings. At the end of the season, Kenin qualified for the WTA Elite Trophy as the second seed, ranked No. 12 in the world. She won her opening match against compatriot Alison Riske, but lost to Karolína Muchová and did not advance out of her round-robin group. Kenin was also named the second alternate at the WTA Finals, behind Kiki Bertens. After Naomi Osaka and Bianca Andreescu both withdrew, she had the opportunity to play one match, losing to the defending champion Elina Svitolina. She finished the year ranked No. 14 in singles and No. 39 in doubles. Kenin also received the WTA Most Improved Player of the Year award for her breakthrough season, becoming the first American player to win the award since Serena Williams in 1999.
On the 500th anniversary of the master's death, the Louvre held the largest ever single exhibit of Da Vinci works, from 24 October 2019 to 24 February 2020. The Mona Lisa was not included because it is in such great demand among visitors to the museum; the painting remained on display in its gallery.
In October 2019, in partnership with HeliFlight, Uber began offering a helicopter taxi service between Manhattan and John F. Kennedy International Airport.
In 2019 Riot Games celebrated the 10th anniversary of League of Legends. During an online stream, Riot announced a variety of new game projects based on the world of League of Legends, as well as in-game gifts which players would receive.
In October 2019, after Trump spoke to Turkish president Tayyip Erdoğan, the White House acknowledged that Turkey would be carrying out a planned military offensive into northern Syria; as such, U.S. troops in northern Syria were withdrawn from the area to avoid interference with that operation. The statement also passed responsibility for the area's captured ISIS fighters to Turkey. In the following days, Trump suggested that the Kurds intentionally released ISIS prisoners in order to gain sympathy, suggested that they were fighting only for their own financial interests, suggested that some of them were worse than ISIS, and termed them "no angels".
Among several State Department employees testifying to congressional committees in October 2019, William Taylor, the chargé d'affaires for Ukraine, testified that soon after arriving in Ukraine in June 2019, he found that Zelensky was being subjected to pressure from a private initiative directed by Trump and led by Giuliani. According to Taylor and others, the goal was to coerce Zelensky into making a public commitment to investigate the company that employed Hunter Biden, as well as rumors about Ukrainian involvement in the 2016 U.S. presidential election. in October 2019, William Taylor, the chargé d'affaires for Ukraine, testified that soon after arriving in Ukraine in June 2019, he found that Zelensky was being subjected to pressure from a private initiative directed by Trump and led by Giuliani. According to Taylor and others, the goal was to coerce Zelensky into making a public commitment to investigate the company that employed Hunter Biden, as well as rumors about Ukrainian involvement in the 2016 U.S. presidential election.
Apple announced AirPods Pro on October 28, 2019, and released them two days later on October 30, 2019. They include features of standard AirPods, such as a microphone that filters out background noise, accelerometers and optical sensors that can detect presses on the stem and in-ear placement, and automatic pausing when they are taken out of the ears. Control by tapping is replaced by pressing a force sensor on the stems. They are rated IPX4 for water resistance.
AirPods Pro was released in late-2019 and feature Active Noise Cancellation (ANC) as well as Transparency mode, which uses the AirPods’ exterior microphones to amplify the sound of the outside world into the user’s ears rather than cancel it.