In 2012 Warren played three games for the Bermuda U20 national team in the 2012 CONCACAF Gold Cup, his debut coming in a 2–0 loss against Barbados U-20.
He was discovered with severe head injuries on North Shore Road in Hamilton Parish and died a short time later at King Edward VII Memorial Hospital.
[7] Months following the fatal collision, Warren's family (aided by the Bermuda Police Service) plead with the public for any information surrounding his death.
[8] Shortly thereafter, former local Senator and Junior Minister for Health, National Security and Transport, Curtis Richardson, was charged with causing the death of Marco Warren by driving without due care and attention.
[9] Senior magistrate Maxanne Anderson released Mr. Richardson on $25,000 bail with surety and the matter is set to return to the courts in December 2023.