Defense advocates do not do proper home work and loose easiest of easy cases.
All defense advocates must read the current citations before taking the brief.
Now in your case stolen cheque theory is rejected by all court till SC.The reasioning is simple that why signed cheque was kept. How only the particular cheque was stolen.And how the thief knew where the cheque was kept. And a thief will never put his neck out to go to court with a stolen cheque. He or she will either encash it and if no money will simply throw it if at all it was stolen.
So now you should make efforts to show that there was no legal liability.