The Brookfield Police Department says there has been an increase in motor vehicle thefts and thefts of property from unlocked cars.  Police are reminding residents to lock unoccupied cars and not leave valuables inside.  They say complacency is one's biggest weakness. Brookfield Police say crime knows no boundaries, and little steps can deter a criminal.  Brookfield Police also posted a video of a suspect who opened one car door, rummaged through the vehicle and then tried the handle of another car.  When the alarm went off, the suspect ran away.