XXXTentacion's murder has brought a rapper's career to a screeching halt ... so says the rapper himself, who at one point was linked to the murder.
Rapper Soldier Kidd tells TMZ ... his career's been derailed ever since online accusations of his possible involvement in XXX's shooting caught the eye of investigators.
TMZ broke the story ... cops working on the case were homing in on the Florida rapper after he posted a pic of himself with a gun while he was at a fish and chicken joint not far from the crime scene.
A grand jury indicted 4 people in the murder case.
Kidd -- who btw says he could be the next XXX -- says he couldn't have been happier he's legally in the clear, but he says in the court of public opinion he's still suffering.
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