Rising gay rapper Kevin Fret was killed in a hail of bullets while riding his motorcycle in San Juan, Puerto Rico in January 2019 — now nearly four years later, a prosecutor says her supervisor told her to end her investigation into the killing of the 24-year-old.Betzaida Quiñones Rodríguez claims then-chief prosecutor of the Puerto Rico Justice Department, Olga Castellón, shut down the Fret investigation just three months after the killing, NBC News Reports. Rodríguez lays blame on not only Castellón, but the U.S. territory's secretary of justice at the time, Wanda Vázquez. Rodríguez says Castellón and Vázquez were in constant communication over the high-profile case.Fret was an up-and-coming out rapper; his debut single, "Soy Asi," made traction in the music industry with the music video garnering nearly 6 million views.Before his killing, Fret was accused of extortion by another musician, reggaeton star Jan Carlos Ozuna, known professionally as Ozuna.