Southbury Police are investigating a series of thefts from cars and other crimes.  Police say 3 people dressed in black hoodies entered cars in the Walnut Brook Lane around 3am Friday.  Southbury Police say the suspects were driving a red Jeep Cherokee and a dark-colored Acura RDX.   The Acura was reported stolen from a home in the area and later seen speeding down Main Street North.  State Police say the driver struck a guardrail on I-84 and fled on foot.  Anyone with information is asked to contact Southbury Police.  Residents are being reminded to lock cars and night and not leave valuables in plain sight.