http://www.stuff.co.nz/stuff/0,2106,3287440a10,00.html
Matt conway
"Sex attacks, assaults and robberies are among more than 17,000 crimes to go unpunished in the last decade � despite police knowing who committed them.
A Christchurch detective has raised ethical concerns with 'custody clearances', in which prison inmates own up to further offending without being charged.
The arrangement improves crime statistics and allows criminals to leave prison without fear of being rearrested.
Figures released by police to The Weekend Press show that 17,821 offences have been 'solved' this way since 1995. "
