公安部A级通缉犯，在狱中从不使用真实口音，隐瞒身份13年……

Core Viewpoint - The case of "Liu" has been resolved after 13 years, revealing his true identity as a wanted drug trafficker who had been evading justice while incarcerated [3][4][14]. Group 1: Background of the Case - "Liu" was sentenced to death with a two-year reprieve in 2008 for drug trafficking and entered Xingyi Prison in 2012 [5]. - During his incarceration, he provided multiple false identities, claiming to be from different regions and fabricating a backstory of being abducted as a child [5][8]. Group 2: Investigation Challenges - The investigation faced significant challenges due to the long duration of the case, scarce leads, and the involvement of multiple provinces, which hindered traditional investigative methods [6][8]. - Despite extensive efforts, including reviewing all available records and issuing nationwide alerts, initial attempts to identify "Liu" were unsuccessful [8][10]. Group 3: Breakthrough in the Investigation - The breakthrough came with the application of big data technology, allowing law enforcement to compare "Liu's" photos with national databases of wanted individuals [10]. - A match was found with a fugitive named "Gu," leading to further investigation and familial DNA testing that confirmed "Liu's" true identity [10][12]. Group 4: Resolution and Aftermath - Upon confirmation of his identity, "Liu" admitted to being "Gu," marking the end of a long-standing security risk within the prison system [14]. - The prison authorities promptly corrected the information with the original court and transferred additional drug-related evidence to law enforcement [16].