Isn't that obvious? Locking your son in a wall in New York sounds illegal.
This must be troll right? It can't be true!

I have some of my Bitcoin Addresses and their Private Keys. My question is that where and how should i securely store my Private keys so that i don't loose my BTC earnings. Currently i have saved them on my PC in a txt file, which is not the best way.
Please suggest.

This is so nice. If only that there is someone who can also send me such numbers of bitcoin I maybe rich at this time. Is there a reason why your son had to suggest to escape police. This is actually a big money you can buy anything that you want but of course that this is beyond your money control..

I suggest buying a dictionary. You can never go wrong with a good dictionary. I recommend the Oxford English Dictionary, Second Edition. Though neither it nor bitcoins will help you escape the police.

If you have an specific need to escape the police, try hiring a lawyer instead of discussing the matter on a public forum that the police can read.