ToplineJonathan Andic, the son of Isak Andic, the billionaire founder of Spanish fast fashion retailer Mango, was arrested and detained by Spanish police before a court appearance related to his father’s death in 2024 after he fell while on a hike, according to multiple reports.Jonathan Andic is escorted by Catalan police officers to a court in Martorell, near Barcelona.AFP via Getty ImagesKey FactsJonathan was arrested to be taken before a judge at a court outside Barcelona for questioning, police in the Spanish region told Reuters, although the investigation remains sealed.Isak Andic died in December 2024 after falling about 300 feet while hiking on Montserrat, a mountain in Catalonia, and his death was initially investigated as an accident.Later in 2025, police began examining the billionaire’s death as a possible homicide, Spanish newspaper El Pais reported.Jonathan, Andic’s eldest son and at that time his heir apparent, was the only person present with his father on the hiking trip, according to the report in El Pais.The Andic family told multiple outlets Jonathan was cooperating with investigators, and Mango did not return a request for comment from Forbes.Forbes ValuationAt the time of his death in 2024, we estimated Andic and his family’s net worth at $4 billion. Jonathan was seen as the presumptive heir to Isak’s fortune, made primarily from the fashion retailer he founded in 1984. Jonathan is still the co-owner of the holding company that is the majority shareholder of Mango, alongside his two sisters.Surprising FactJonathan only briefly ran Mango for about four years, from 2014 to 2018, according to another report in El Pais. His father replaced him with current CEO Toni Ruiz, who also replaced Isak as chairman of Mango’s board after the founder’s death. Anonymous sources told the Spanish newspaper this replacement may have caused a rift between father and son. Jonathan remains vice-chairman of the board, according to the company’s website.TangentDespite the ongoing turbulence within the Andic family, Mango reported record earnings in 2025, growing 13% year-over-year and reaching an estimated €3.8 billion in revenue for 2025. Mango has also been steadily expanding in the United States, with at least 65 locations in the country as of March 2026, including after the company opened a store in the Mall of America.