JD Twitch, co-founder of influential DJ duo Optimo, died at 57 from a brain tumor on Sept. 19, 2025.

Keith McIvor, known as JD Twitch and a founding member of the influential Glasgow DJ duo Optimo, has died at 57 after battling an untreatable brain tumor. He passed away peacefully at Glasgow’s Prince and Princess of Wales Hospice on September 19, 2025. His longtime collaborator Jonnie Wilkes shared the news, honoring McIvor’s passion for music, creativity, and social change, and reflecting on their 28-year partnership. McIvor played a key role in shaping the global dance music scene through Optimo’s long-running Sub Club event, their label Optimo Music, and innovative club nights like Pure. He was celebrated for his eclectic taste, artistic vision, and lasting impact on electronic music and culture.