SAO PAULO, Brazil (AP) _ Declassified police documents show authorities knew Nazi war criminal Josef Mengele was living in Brazil in 1968, but failed to arrest him.

Mengele's presence was first confirmed on June 6, 1985, when his remains were unearthed in a cemetery near Sao Paulo.

Documents that belonged to the now-defunct political police department in Parana state were declassified two weeks ago and sent to the state's public archives. Political police kept tabs on private citizens during Brazil's right-wing military regime between 1964 and 1985.

The documents show Mengele - known as the ''Angel of Death'' because of his barbarous actions while a death camp doctor - was living in Marechal Candido Rondon, a city 370 miles from Curitiba, the state capital.

Archives director Adolpho Mariano da Costa said by phone that police not only knew of Mengele's presence in 1968 but also ''monitored his life'' at the time.

Witnesses said Mengele drowned on Feb. 7, 1979, while swimming at a beach resort near Sao Paulo.