"From Jan. 1, 2010 through Jan. 2 of this year, police shot eight men. Of those, two were diagnosed with mental illness, and had substance abuse problems. Three were under the influence of intoxicants and possibly had mental health issues. One suffered from depression, according to the police study. ... In five of the eight shootings, less-lethal weapons -- often Taser stun guns -- were used, but didn't incapacitate the suspects. "It doesn't always work. They aren't as effective as you would like," Stewart said. As a result, the bureau is moving to a Taser gun with a dart that is just over a half-inch long that will allow officers also to shoot from as far as 25 feet away, compared to the current 21-foot distance. "We hope the increase in this dart length will cause for a better connection, and it will be incapacitating," Training Lieutenant Robert King said. "