Ursula and Sabina Eriksson

Ursula and Sabina Eriksson (born 1967) are Swedish twin sisters who came to national attention in the United Kingdom in May 2008 after an apparent episode of folie à deux (or "shared psychosis"), a rare psychiatric disorder in which delusional beliefs are transmitted from one individual to another, which resulted in a series of bizarre incidents on the M6 motorway and the subsequent killing of Glenn Hollinshead of Fenton, Staffordshire. There was no evidence that drugs or alcohol were involved in the incidents on the M6 or the death of Hollinshead.

The twins had been in Ireland before travelling to England and boarding a coach for London at Liverpool. Their odd behaviour after exiting the coach at a service station on the M6 – including not allowing the bags they were clutching to be searched – caused the driver not to allow them back on the coach. The two were later seen on the central reservation of the M6. When Highways Agency Traffic Officers arrived to assist the women, they ran across the busy motorway. Ursula managed to dodge traffic; Sabina was first struck by a SEAT Leon.

Shortly after police arrived, the women again ran onto the motorway and were struck by oncoming vehicles, a Volkswagen Polo hitting Sabina and a Mercedes-Benz Actros lorry crushing Ursula's legs. Sabina suffered a serious head injury that left her unconscious for several minutes. When Sabina regained consciousness, she refused medical aid and attacked a police officer, at which point she was arrested. Appearing calm, although a bit "odd", as she was processed by police in Stoke-on-Trent, she was therefore released from custody. Shortly afterward she was taken in by Hollinshead, whom she later stabbed to death in an unprovoked attack. She was pursued running from the scene and arrested in hospital after jumping from a bridge onto a busy trunk road, later pleading guilty to manslaughter with diminished responsibility. She was sentenced to five years imprisonment and released on parole in 2011.

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