A court in Cardiff is hearing how defendant Matthew Tvrdon told police he thought something might have put in his food which caused him to drive so erratically and target five separate families.
He also claimed in police interviews that he was merely trying to drive the van to somewhere quiet so he could get some sleep.
Doctors have agreed he was suffering from a mental condition known as "gas lighting". The defendant himself says he was aware of suffering from the condition, which he researched on his own computer.
More top news
Ed Miliband has said he is willing to take part in a TV debate with David Cameron 'anytime, any place, anywhere'.
Swansea striker Bafetimbi Gomis has been stretchered off the pitch after collapsing during his side's clash with Spurs at White Hart Lane.
ITV News has obtained a video statement made by a former Royal Marine who was later killed fighting against Islamic State in Syria.