here's what you do. Find a friend that has a similar car as yours and park it in your complex. Make sure and leave CD's and othe valuables clearly showing. Get yourself a baseball bat and a fifth of mad dog and camp out in a discreet area. Make sure to dress in black and get a mask too. Do this every night until you catch the bastard. then proceed to give him the worst ass beating he has ever had.
And if there is more than one, which I almost guarantee there is, bring a gun, guns make good friends when outmanned in a fight.