Police Chief RaShall Brackney-Wheelock said at a news conference that officers secured search and arrest warrants for Jacques Ratliff and arrested him when they encountered him walking on the street. The arrest comes more than five weeks after Fortune's body was discovered on 3 August hanging from a tree behind a vacant house in Jackson.
The state medical examiner on Thursday ruled Fortune's death a homicide, confirming what the family and community activists had long feared. The case had drawn widespread attention and petitions signed by tens of thousands of people calling for transparency and federal intervention.
Fortune's mother, Christy Spivey, had previously told the BBC she was angered by investigative delays, saying she had received no updates from police for weeks. She described multiple enquiries to authorities that went unanswered. The first update came in a public city meeting on Tuesday evening, when Police Chief RaShall Brackney discussed the case and said the department had been investigating it as a potential homicide from day one.
The city of Jackson, which is majority Black, had been on edge, with the death evoking the state's dark history of racial violence and lynchings. Members of US Congress had called for federal intervention. Spivey, in a selfie with her daughter shared with the BBC, had pleaded: "What is the hold up?"
Further details about the circumstances of Fortune's death or the evidence leading to Ratliff's arrest have not been released. The investigation remains ongoing.