I am so sorry to here about what you are going through. To answer your question, yes, you can probably get it back, though you will have to do some digging to do so. I would contact the lender that your son was dealing with and tell them that you would like to purchase the home from them as soon as you can.
NOW your son has a right to settle the debt if the title to the property has not yet been transferred to the bank and this can take some time to do even in a non-redemption states like MA. If you want to work through him you need to act fast and contact the lender.
If your son needs any information about getting his life back in order after foreclosure and potentially back into a home there are ways to do that, visit http://www.MortgageTrainingProgram.com for more info.
First Weber Group
Certified Distressed Property Expert