Being unemployed may make some turn to crime to support themselves. Crime often puts people in stressful situations. People in stressful situations sometimes

Being unemployed may make some turn to crime to support themselves. Crime often puts people in stressful situations. People in stressful situations sometimes act violently, even if that's not their default mode of conduct. As a simple example, imagine someone shoplifting some food from a market, where an employee confronts them and bars their way, saying they are calling the police. The shoplifter tries to leave, and a scuffles ensues while the employee tries to restrain the accused. It's very easy for the crime to become assault while someone is fleeing, and nobody needed to intend for any violence at any point.