Yeah, thats believable.
If this is true — and I most seriously doubt for a second it is — the killer should be banned from driving for life.
I have asthma and had a coughing fit so bad once, I lost my eyesight for about 5 seconds. I was on a curve with a cliff on my right side. I held the wheel in the same position and braked steadily to a stop. When my vision returned my right tires were 6 inches onto the right shoulder. I had used my inhaler a minute or so prior but it handed kicked in.
This is an old legal trick. If ever involved in a wreck say you sneezed. It is impossible to sneeze without closing your eyes. Advice passed on to me by a friend in law enforcement.