Hi,
if you get a call from police it's advisable to meet them and inform them what has happened and how it affected your business and you had loss due to the delayed delivery of orders.
2. Since there is no contract signed between you and the employees, legally you can not invoke the rule of two months notice, however you are liable to compensate them their salary if they have worked.
3. It is necessary to get to your staff to sign the contract of notice period if you decide to take any action, and in the contract you should mention that in case of leaving the job without notice period the basic of the salary will be deducted from the last salary due.
4. To implement this condition you should have other labour rules in place like HRA,DA, gratuity and PF as per the existing rules of your state/country.if you do not want any of these fair labour policies, it is better to pay the employee and settle them their dues.