Wisconsin Attorney General Josh Kaul says shootings at two high schools in the state in two days shows the need to invest in services to help troubled students and to limit their access to guns. The state Department of Criminal Investigations is leading the probe into a shooting Tuesday at a school in Oshkosh that left a student and the police officer who confronted him injured. It comes a day after a police officer shot an armed male student in a classroom at a Milwaukee-area high school. Kaul, a Democrat, says his department’s office of school safety will work with both districts on how to prevent future acts of violence. Kaul says the key is identifying problems before they happen and getting students the mental health or social work assistance that they need. Kaul supports a pair of bills blocked by the Republican Legislature to institute universal gun background checks and give judges the power to take firearms from people determined to be a risk.