quick getaway. reporter: people use these items, often unaware of who s around. how careful are you when you use your phone? reporter: police tell us, robberies have jumped up 30% from this time last year. it kind of brings the place station out to the community. reporter: a visual deterrent, but more. pretty amazing tool right there. reporter: police gave us an exclusive behind the scenes look at how they re trying to catch criminals in the act. using cameras mounted on the trailer. officer jim gordon tells me, the technology inside the command unit allows police to hone in on criminal activities. 360degrees in a four block radius. this tool is part of the plan to divide the city into five districts. each with a focus on problems specific to the area. i think it s great, hopefully, it s not robbing peter to pay paul. reporter: one woman tells me there have been 12 incidents during the past month. people getting their phones taken while their walking down
the program tomorrow. they take the iphone, our the wallet, and make their quick getaway. reporter: people use these items, often unaware of who s around. how careful are you when you use your phone? reporter: police tell us, robberies have jumped up 30% from this time last year. it kind of brings the place station out to the community. reporter: a visual deterrent, but more. pretty amazing tool right there. reporter: police gave us an exclusive behind the scenes look at how they re trying to catch criminals in the act. using cameras mounted on the trailer. officer jim gordon tells me, the technology inside the command unit allows police to hone in on criminal activities. 360degrees in a four block radius. this tool is part of the plan to divide the city into five districts. each with a focus on problems specific to the area. i think it s great, hopefully, it s not robbing peter to pay paul. reporter: one woman tells me there have been 12 incidents during