VIDEO: The La Crosse police and fire departments are working together to investigate a string of suspicious fires that they say could be arson. Fox 25/48's Erin O’Brien has more on the fires and why investigators say they could be connected. Ten fires over the last six months in La Crosse have police and firefighters wondering if they're all connected. "We were able to find some unusual aspects of some of these fires that would point towards human involvement so at that point they're labeled as suspicious."