A driver who fell asleep at the wheel, then crashed killing another motorist, has been jailed.
Lincoln Crown Court heard Christopher Brunt had only two hours sleep when he "nodded off" at the wheel.
His BMW struck a skip lorry before hitting a Ford Focus being driven by 20-year-old Adam Mohamed on the A631 near Market Rasen.
Brunt, 51, from Whitwell, Derbyshire, was jailed for 30 months, and banned from driving for three years.
He admitted a charge of causing death by careless driving in the crash on 8 April 2015.
Simon Ash, prosecuting, said Brunt, who was holidaying in Cleethorpes with his family, spent the previous night sleeping in a chair at hospital in Chesterfield after his father suffered a suspected stroke.
The crash happened at North Willingham while he was travelling back to the resort.
Mr Ash said Brunt's BMW X3 collided with a skip lorry and then struck Mr Mohamed's Ford Focus which was coming in the opposite direction.
Accident investigators said the BMW lost a wheel hitting the lorry, which would have made it difficult to steer.
However, the court heard Brunt "did not seem to take any action to avoid hitting the Focus".
When he was interviewed by police he said he had no recollection of the crash.
The court also heard Brunt "had showed no remorse" over what happened.
Alison Summers, in mitigation, said: "His sleep was limited. That lack of sleep combined with his worry at his dad's condition no doubt caused him to lose concentration and to fall asleep at the wheel."