UNDATED (WSAU) The mother of murdered college student Brittany Zimmermann joined two state legislators yesterday in announcing a bill to make those arrested for felonies give their D-N-A to the police.

Jean Zimmermann of Marshfield said it would save lives. Her daughter was killed near U-W Madison a year-and-a-half ago, and police never found a suspect.

The bill she’s supporting would add thousands more D-N-A samples to a state data-base which already collects them from those convicted of felonies. Senate Republican Sheila Harsdorf of River Falls and Assembly Democrat Ann Hraychuck of Balsam Lake introduced their bill yesterday.

That was after reports that up to 12-thousand convicts never put their D-N-A into the database, including 400 registered sex offenders. Harsdorf says it would be much easier for police to collect D-N-A when they arrest people. And she brushed back criticisms that it would cost too much, saying it would save on investigative costs.

The American Civil Liberties Union says it has the potential to be a huge violation of privacy – especially for people who are acquitted at trial. Opponents also say it would overwhelm the state crime lab where D-N-A is tested.