What steps you will opt for if you saw a coworker stealing?

You can show the interviewer that you have high ethical standards and don’t tolerate any unethical behavior or stealing.

“This is a great company and there must be some rules and policies for this unethical behavior. All I know is that we should not tolerate stealing, regardless of the value of that item. If today that person is stealing an item worth $1, tomorrow he/she could steal an item worth $100. I will find the right way and the right person to whom this incident should get reported.”