Commerce Secretary John E. Bryson, who was treated for a seizure after being involved in two separate traffic accidents over the weekend, will take a medical leave of absence from his job, the Commerce Department said late Monday.
Bryson told President Obama in a memo that he would transfer his duties effective immediately to Deputy Commerce Secretary Rebecca Blank, according to the statement released Monday night.
"I am taking a medical leave of absence so that I can focus all of my attention on resolving the health issues that arose over the weekend," Bryson said in the memo.
A succession of small fender benders over the weekend raised questions about whether Bryson has a medical or legal problem -- or both.
The bizarre series of events happened Saturday afternoon, when Bryson hit a car stopped for a train -- twice -- then rammed into another vehicle a few minutes later. He was found unconscious in his car, and government officials said Monday he had a seizure, which could play a role in whether he's charged with felony hit-and-run.
It wasn't clear whether the medical episode preceded or followed the collisions, but Bryson hasn't suffered a seizure before, said a department official who spoke on condition of anonymity to discuss the secretary's medical history.
Bryson has a "limited recall of the events," the official said.
The crashes drew attention because of health concerns involving a member of the U.S. Cabinet, as well as the challenge investigators face when trying to determine if someone should be held criminally responsible because of adverse health.
Bryson, 68, was driving alone in a Lexus in San Gabriel, a community of about 40,000 northeast of Los Angeles, when he struck the rear of a vehicle that had stopped for a passing train, authorities said.
He spoke briefly with the three occupants and then hit their car again as he departed, investigators said. They followed him while calling police.
He was cited for felony hit-and-run, though he has not been charged.
Bryson then struck a second car in the nearby city of Rosemead, where he was found unconscious in his car, authorities said.
Bryson has returned to Washington after a brief hospital stay, department spokeswoman Jennifer Friedman said.
Obama said he found out about the crashes Monday but hasn't yet spoken with Bryson.
"And my hope is that he's doing all right," he told KTIV-TV in Sioux City, Iowa, early in the day. "It sounds like it was health-related in some way. But we're going to make sure that obviously he gets the best care, and we'll be able to make a determination from there."
Officials said Bryson was not on state business, was driving a personal car and did not have a security detail at the time.
He took a Breathalyzer test that didn't detect alcohol, but investigators were awaiting the results from a blood test, said Los Angeles County Sheriff's Capt. Mike Parker.
Commerce officials said he was given medication to treat the seizure. Paramedics treated two people in the first collision for pain, but a couple involved in the second crash declined medical aid.
The case was being reviewed by sheriff's investigators and will likely be submitted to prosecutors in the coming days. Defense attorney Steve Meister said "it's difficult to assign criminal liability when someone was medically unconscious. They have to be aware what was happening."
Meister said he has represented people who have been involved in crashes while having seizures. He recalled one woman who struck another vehicle and didn't remember anything.
The episode is consistent with someone who has suffered a series of epileptic seizures, said Dr. Jerome Engel Jr., a neurologist at the University of California, Los Angeles, who is not involved in Bryson's care.
After a seizure, a person is often confused, and that state of confusion can last for a while. "You may even seem to be alert and awake, but you're not really behaving normally," Engel said.
Under California law, a doctor has to report a patient who complains of lapses of consciousness or whose epileptic seizures pose an impairment to driving. In those cases, a person can't drive unless he's been seizure-free for three months.
Bryson had been in California to deliver the commencement address Thursday at Pasadena Polytechnic School, where his four children attended. The K-12 school said he urged students to pursue their passions, to serve their country and to value their education and friendships.
Obama swore in the former utility executive as the head of the Commerce Department in October, after easily overcoming conservatives' objections that Bryson's pro-environmental views made him unsuitable for the job.
As secretary, Bryson is a member of the president's economic team and has advised on energy issues.
He is the former head of Edison International, the holding company that owns Southern California Edison, and he has served on boards of major corporations, including the Boeing Co. and the Walt Disney Co.
He helped oversee Edison's transformation into a leading wind and solar company.