Craig Turner was 59 when he was found dead in July at his Los Angeles home from a self-inflicted gunshot wound.
Speaking to BBC News, Tina Turner said he had seemed fulfilled in both his professional and personal life after finding a new girlfriend.
"I still don't know what took him to the edge," Turner said, "because at that stage he had said to me that he had never met a woman that he felt that way about."
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