In April 2020, he was granted early release during the COVID-19 pandemic following fears over his vulnerability to the disease due to his asthma condition. During the trial, Hernandez testified for the prosecution against other Nine Trey gang members and was sentenced to two years in prison. Facing a minimum of 47 years in prison, he pleaded guilty to nine charges including conspiracy to commit murder and armed robbery in February 2019. In 2018, he was arrested on racketeering and other weapons and drugs charges. In 2015, Hernandez pleaded guilty to a felony count of use of a child in a sexual performance and received a four-year probation period and a 1,000-hour community service order. Despite negative critical reception, Dummy Boy peaked at number 2 on the Billboard 200 and was certified platinum by the Recording Industry Association of America (RIAA). ' Fefe' (featuring Nicki Minaj and Murda Beatz), the second single from his debut album Dummy Boy (2018), peaked at number three on the Hot 100. He subsequently released the mixtape Day69 (2018), which was supported by the singles ' Kooda', ' Keke' (featuring Fetty Wap and A Boogie wit da Hoodie), and ' Gotti', all of which charted on the Billboard Hot 100.

Hernandez became widely known in late 2017 after the release of his debut single, ' Gummo', which was a sleeper hit. His music has been marked by an aggressive style of rapping, while his controversial public persona is characterized by his distinctive rainbow-colored hair, extensive tattoos, legal issues, and publicized celebrity feuds. Daniel Hernandez (born May 8, 1996), known professionally as 6ix9ine (stylized 6IX9INE and pronounced 'six nine') and formerly as Tekashi69, is an American rapper.

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