A more thorough explanation:

Par delictum

Par delictum means equal guilt or equal wrong. It is a Latin term used in legal contexts.

Two people who commit the same crime are said to have par delictum because they have equal guilt or responsibility for the wrongdoing. For instance, if two people steal a car together, they are both equally guilty of the crime.

Another example is in a case where two parties are involved in a contract that is illegal. Both parties are said to have par delictum because they are equally responsible for the illegal act.

These examples illustrate how par delictum is used to describe situations where two or more people share equal responsibility for a wrongdoing.