My God, shazo bhai, I feel really really sorry for you yaar! Thats indeed a very sad story.
I must say, NEVER leave ANY of ur precious possessions in ur cars people. They are more prone to being stolen than a car itself.
Laptops, mobile phones, wallets etc are a thieves honeycomb. They know there is gonna be something to steal in the back seat of a 2 million car.
The ONLY way, IMO to stop these thieves is "apni madad aap" cz all of us know, Police is not gonna do anything just cz a dude got his laptop stolen worth a few thousand bucks. U'll have to pay the Police more than the laptop was worth to get it back, which seems pretty lame useless to me.
The all time famous idea of using "bait" cars is gonna come in handy perfectly. Its about to leave a car with possessions like laptop, mobile phone etc on the back seat and waiting for the guy to attack them while waiting with a licensed 12 gauge shotgun in a car with fully tinted windows.
let him crack open the car, just by the time he is about to leave with the things, Catch him, tries to run?, unload a couple of rounds to bang him down.
Thats the only way they'll learn cz its NEVER a single person in action, its always a gang of five or seven dudes who perform these robberies.
One goes down, the others stay low for a few months.
For me, a licensed 9mm in the dash while driving has been serving the purpose, cz no one's gonna help you but your own self.
cz nowadays, one feels like stepping into a war zone, the moment he leaves his home. Always be ready for ANYTHING to happen to you on the roads. :(