Police officer in Wis. killed, another wounded

This undated photo provided by Fond du Lac Police Department shows Officer Craig Birkholz. Fond du Lac Police Chief Tony Barthuly says Birkholz, 28, was shot in the upper chest and killed by a man inside a home on the city's west side began firing on Sunday, March 20, 2011 in Fond du Lac, Wis. The suspect, James Cruckson, 30, was found dead inside the house from a self-inflicted gunshot wound after the standoff with police ended, police said. Authorities used armored vehicles and shields to evacuate residents from nearby homes during the standoff. (AP Photo/Fond du Lac Police Department)

March 20, 2011 7:44:09 PM PDT
A Wisconsin man opened fire on police during a six-hour standoff at a house, killing one officer and critically wounding another, authorities said.