A court in Thailand on Thursday sentenced Daniel Sancho Bronchalo, the son of the Spanish actor Rodolfo Sancho, to life in prison after finding him guilty of murdering a Colombian surgeon and dismembering his body.

       The trial, which ended in May on Koh Samui, an island popular among tourists, drew international headlines for involving the scion of a famous Spanish acting family and for the gruesome nature of a killing in a region known for its resorts, parties and beaches.

       Prosecutors had accused Mr. Sancho, 30, of murdering Edwin Arrieta Arteaga in August last year. The two men had met up on the Thai island of Koh Phangan during its monthly full-moon celebrations, during which partygoers dance all night on the beach. Mr. Sancho said they had connected on Instagram a year earlier and become romantically involved, the Spanish newspaper El País reported.

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       Mr. Sancho being escorted by a police officer on Koh Phangan, an island known for its full-moon parties. Credit...Somkeat Ruksaman/EPA, via Shutterstock

       During the trial, prosecutors accused Mr. Sancho, a chef who posted cooking videos on YouTube, of purchasing knives and a saw before meeting Mr. Arrieta, a 44-year-old surgeon from northern Colombia. Mr. Sancho then killed Mr. Arrieta, they argued, before dumping some parts of the body in a landfill on the island and others in the sea. After attending a full-moon party the next evening, he reported Mr. Arrieta as missing to police officers.

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       Mr. Sancho, whose mother, Silvia Bronchalo, is also an actress, pleaded guilty to a charge of concealing the body, according to a statement from the Koh Samui Provincial Court, and he admitted during the trial to dismembering and disposing of Mr. Arrieta’s body.

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