Only known authenticated photo of notorious outlaw Billy the KidThe only known authenticated portrait of the notorious outlaw Billy the Kid has sold for $2.3m (£1.4m) at auction in Denver, in the US state of Colorado. The tintype – an early form of photo using metal plates – is believed to have been taken in 1879 or 1880 in Fort Sumner, New Mexico.

Only known authenticated photo of notorious outlaw Billy the Kid
The only known authenticated portrait of the notorious outlaw Billy the Kid has sold for $2.3m (£1.4m) at auction in Denver, in the US state of Colorado. The tintype – an early form of photo using metal plates – is believed to have been taken in 1879 or 1880 in Fort Sumner, New Mexico.