Caran Johnson, who live tweets police activity in Vancouver, Wash., under the handle "ScanCouver," began tweeting about the crash on Interstate 205 at about 2 p.m. Wednesday, NBC News reported.
"This accident sounds horrible," she started.
Soon after, Johnson tweeted that she feared her husband was involved in the crash.
"I'm trying not to panic, but my husband left work early and he drives 205 to get home. he's not answering his phone," she tweeted. "How long do i wait for him to come home before I call the police?" she added later.
At about 4 p.m., Johnson confirmed her suspicion and tweeted, "it's him. he died."
Local police confirmed that Craig R. Johnson, 47, was killed at 1:40 p.m. when his vehicle crossed into oncoming traffic and collided with a pickup truck. The driver of the truck survived but was seriously injured, police said.
Investigators have not yet determined the cause of the crash, but Johnson tweeted that her husband suffered from epilepsy and had been feeling faint earlier in the day.