Complex sentence: Earnhardt's death was officially pronounced at the Halifax Medical Center at 5:16 PM Eastern Standard Time (22:16 UTC), and nearly two hours later, NASCAR president Mike Helton announced Earnhardt's death.
Split into simpler sentences: Earnhardt's death was officially pronounced at the Halifax Medical Center at 5:16 PM Eastern Standard Time (22:16 UTC). Nearly two hours later, NASCAR president Mike Helton announced Earnhardt's death.