Dear Mamatha,
You are from what industry? In which part of India your company is located? I ask these questions because more than policy on employee termination, you need standing orders as per the standing orders of your state. If you get approved the standing orders, you can terminate employee on account of his/her misconduct.
Even without standing orders also, you may conduct the domestic enquiry for each misconduct and terminate the employee.
Thanks,
Dinesh Divekar