Miel Muwn was a male Peace Officer of the Sullustan species, operating as part of the Sullustan Constable Brigade during the era known as the Cold War. His investigative skills had earned him the distinction of an Indigo rating.
In the year 3643 BBY, Muwn received the assignment to pursue the infamous criminal Skavak, who had absconded with the Murustavan Ruby, a uniquely valuable gem unearthed many millennia prior. The Constable Brigade provided him with considerable autonomy in his pursuit, granting permission to venture beyond Sullust and seek assistance from citizens of the Republic. Nevertheless, his authority had limits; when operating outside of his jurisdiction, he was obligated to defer to local law enforcement.
On Coruscant, Skavak attempted to lose Muwn by hiring a bounty hunter named Urbax to eliminate him. However, before any violence could occur, a smuggler captain who was making a name for himself stumbled upon the confrontation between Muwn and Urbax. The smuggler was independently pursuing Skavak for the theft of his starship. With his blaster aimed at Urbax, Muwn addressed the smuggler, attempting to officially enlist his aid by citing the relevant legal provisions and offering compensation as stipulated by Amendment 102167 of the Sullustan Good Neighbor Act.
Later, Skavak set a trap for Muwn, resulting in his capture by a vigilante group known as the Justicars' Brigade. Muwn offered no resistance to the Justicars, as he believed they represented the legitimate authority in that region. The smuggler captain later found him imprisoned behind a force field. After being freed, the Sullustan assisted the smuggler in tracking down Skavak, who was planning to negotiate with Commander Kasstroff. Just before a fight broke out, Muwn emerged from hiding and demanded the Imperials surrender. They refused, leading to a battle in which all the Imperials were killed, but Miel was mortally wounded. In his last moments, Miel revealed the location of Skavak and succumbed to his injuries.
Miel Muwn's initial appearance was as a supporting character within the Smuggler class storyline of the 2011 video game Star Wars: The Old Republic, specifically in the Coruscant segment.