If you knew the stealth and speed with which these guys operate,you would appreciate that it is possible for a passing by cop to assume the thugs actually own the cars. Plus they have learnt to predict police movement. It is simple,unless on tip off,once the police officers pass a point,they are unlikely to repeat sequence within 30 minutes. 30 minutes is enough for these guys to clean out up to 6 cars.
Although I wouldn't rule out police involvement (in releasing the suspects),my main suspicion is directed to those men (maybe also women) wearing yellow dust coats and carrying big receipt books....some taxi drivers maybe and lastly shop owners (or their employees) who readily accept the swag/cargo for resale . But a good alarm system is deterrent enough.
One more tip,if you have to drop off someone on some streets,notably Tom Mboya street or Ronald Ngala Street in the busy hours and you have valuables kama laptop in the back seat,be very keen as you disengage the central lock...Those boys are fast and have roving eyes. As for the chokoras on the Globe cinema stretch,just pray...they have a skill for removing corner lamps,windbreakers and side mirrors or snatching mobile phones through rolled down windows and the worst part is that you are better off in the car when they do this.
If you have to pen the trunk at a busy street parking e.g near archives,engage the central lock or alarm and then proceed to open the boot using the key. Do NOT pull the bootlid cable when still in the car. Wacha alarm ilie laikini your valuables will be safer.
Everyday!