Luigi Mangione was allegedly beaten by seven transgender women commonly referred to in Thailand as “ladyboys” in a Bangkok sex bar after a $1,500 dispute — months before he was accused of gunning down UnitedHealthcare CEO Brian Thompson in Manhattan, according to a new book.

The alleged bar brawl, described in a self-published book titled “Last Known Contact: The Untold Story of Luigi Mangione,” adds a new twist to the accused assassin’s chaotic travels across Asia in 2024.

The anonymous author claims to have met Mangione while backpacking in Thailand and says the Ivy League graduate shared messages and photos describing the melee, according to excerpts published by DailyMail.com.

Mangione, 27, and a group of new friends had stopped into what the author called an “infamous sex ba

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