American singer D4vd has been arrested and charged with the murder of a 14-year-old girl, Celeste Rivas Hernandez.

Her body was found in his Tesla in Los Angeles in September last year. Prosecutors allege D4vd repeatedly sexually abused the teen before killing and dismembering her, but D4vd denies all the charges.

He has pleaded not guilty to murder, and his attorneys have said they will "vigorously defend” his innocence.

In this episode, we’re joined by Anoushka Mutanda-Dougherty, the host of the BBC podcast Fame under Fire, to explain what we know so far about what happened to Celeste Rivas Hernandez. And we also look at why it took so long for D4vd to be taken into custody.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Benita Barden and Chelsea Coates Editor: Julia Ross-Roy

Harry Styles, Bad Bunny and Shakira are just three of the many huge pop acts that have decided to do residencies — turning away from long world tours and performing night after night in one major city instead. Residencies make it easier for artists to build elaborate shows, help them avoid burnout from constantly being on the move, and save them the effort (and money!) of transporting their crew, costumes and staging. But they can also make it even harder for fans to get the chance to see their favourite artists live.

BBC reporter Mollie Perella explains why residencies are becoming more popular - and why concert tickets are getting more and more expensive. Artists CMAT and Wet Leg tell us what they think about residencies - and whether they would ever do one. And fans share their thoughts on Harry Styles’ upcoming residency in New York.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Chelsea Coates, William Lee Adams and Ash Mohamed Video producer: Baldeep Chahal Editor: Julia Ross-Roy

People frequently turn to AI chatbots like ChatGPT, Gemini and Grok for health advice. Some people argue that using them is similar to an Internet search. But some experts say that chatbots are getting things dangerously wrong.

James Gallagher, the BBC’s Health Correspondent, explains how chatbots work, what the risks are and how the technology is evolving. We also hear from young people about how and when they seek advice from chatbots.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Santiago Vanegas Maldonado and Benita Barden Editor: Harriet Oliver