The thefts occurred in December, according to officials.
Thieves rob the victims after meeting offline, in the victim's car.
Officers working nights and late afternoons will be testing out the equipment.
Two victims were sitting in cars in Garfield Park last week during the purse-snatchings, police said.
Six Northwest Side garages have been burglarized in recent weeks, police warned.
Five Northwest Side homes have been burglarized in recent weeks, police warned.
Seven Northwest Side homes have been burglarized in recent weeks, police warned.
The officer had a non-life-threatening injury to his leg and a possible concussion, police said.
Jesus "Chuy" Garcia accused Mayor Rahm Emanuel of breaking a promise to hire more police.
Jesus "Chuy" Garcia accused Mayor Rahm Emanuel of breaking a campaign pledge to hire 1,000 officers.
Cellphone stores have been targeted in a string of recent burglaries, police said.
The UIC-Northwestern study aims to interview 2,100 people from nearly every Chicago neighborhood.
The thefts happened in Novemeber and December, police said.
The vests will be issued to Rogers Park cops in memory of their father and his partner slain in 1945.
The thieves enter through basement doors, police said.
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