I'm not surprised by it either, not in Medellin now.
in my bldg in poblado 2 years ago, a group rented an apartment on the 4th floor. they started watching everybody, making schedules as to where everybody lived, coming and going, how many people in the apartments , lifestyle and guards schedule. they broke into 4 apartments before the police figured out it was an inside job. luckily, nobody was hurt, but could have been worse if somebody came home during the robbery.