Green’s Dictionary of Slang

1. stopped and searched by the police.

1864, 1867, 1870

Hotten Sl. Dict.

2. acquitted of a crime in court, esp. through lack of evidence.

1812		Vaux Vocab. of the Flash Lang. in McLachlan (1964) 76: turned up a person acquitted by a jury, or discharged by a magistrate for want of evidence, &c., is said to be turned up.
1859, 1860		Hotten Dict. of Modern Sl. etc.
1873		Sl. Dict.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 49: Turned up Aquitted of police charge.