Jacksonville Drill Rapper Ksoo Pleads Guilty to 2019 Teen's Murder

Hakeem Armani Robinson, the Jacksonville drill rapper who performs as Ksoo, entered a guilty plea to second-degree murder on Feb. 25, 2026 in connection with the 2019 killing of 16-year-old Adrien "Bibby" Gainer Jr. The admission came nearly seven years after Gainer's death and ended the latest chapter in a case that has tugged at Jacksonville's youth violence and music scenes.

The plea came after Robinson had already been convicted and sentenced in a separate matter, a procedural detail that courtroom observers called notable given the timing of the admission. Robinson's decision to plead guilty on Feb. 25 followed earlier litigation and sentencing events that left multiple open questions about how the 2019 homicide would be resolved.

Adrien "Bibby" Gainer Jr. was 16 at the time of his death in 2019; his name has circulated in Jacksonville coverage and online communities tracking youth homicides tied to local rivalries and the drill scene. Robinson's stage identity, Ksoo, and his association with Jacksonville drill music made the case a focal point for both true crime followers and residents who have watched social media amplify local conflicts since 2019.

The second-degree murder plea entered Feb. 25, 2026 brings a criminal charge specific to the 2019 killing into a final disposition phase for Robinson, even as details about sentencing tied to the guilty plea were not released in the public notes provided. Robinson's prior conviction and sentence in a different proceeding now sit alongside this new plea, leaving courts to reconcile multiple adjudications involving the same defendant.

For Jacksonville residents tracking the case, the plea marks a concrete development in a homicide that began in 2019 and has intersected with the city's music culture and criminal-justice processes. Hakeem Armani Robinson's guilty plea to second-degree murder on Feb. 25, 2026 resolves the defendant's status in the 2019 death of 16-year-old Adrien "Bibby" Gainer Jr., even as questions remain about how the courts will finalize sentencing across Robinson's related convictions and sentences.