MADISON, Wis. (AP) -- Several state lawmakers say they plan to introduce legislation mandating psychological testing to become a law enforcement officer in Wisconsin.

Police practices experts say the tests are standard in many other states and are nationally recommended.

The proposed legislation is the result of the mass murder in Crandon by a Forest County sheriff's deputy, who was also a Crandon police officer.

Deputy Tyler Peterson didn't have a psychological test to become an officer, nor did he need one.

The state doesn't require such tests to become a certified officer, although individual departments can decide to do so.

Democratic Representative Ann Hraychuck of Balsam Lake says no amount of psychological screening can guarantee that such a horrible event wouldn't happen in the future.

But, she says the exam could provide law enforcement administrators with assessment tools currently not available.

Democratic Senator Dave Hansen of Green Bay and Republican Representative Garey Bies of Sister Bay are also sponsors of the bill.