Rapist attacked Swedish au pair in park in 1984

A rapist who attacked a Swedish au pair in a park in 1984 was linked to the crime 30 years later by his DNA, a court heard. Billy Day, 50, allegedly targeted the 19 year-old woman as she walked through Hendon Park in north London in high heels on her way to meet a friend. He threatened to stab her and break her neck before telling her he was ‘off to find another girl’, it is claimed. Day was only…