vicarious liability
In certain circumstances, a defendant may be liable for the actions of another. Under a vicarious liability theory, the relationship between the two parties must be examined. A person's negligent actions or negligence is imputed to the defendant because of the relationship between the two.
Note: A parent cannot generally be liable for the torts of a their child based upon the relationship alone.
Employer/Employee
Generally, an employer is liable for the torts committed by one of its employees acting within the scope of the employees duties. When an employee actions with the intention to further the employers business, the employer may be held liable even if the employer did not encourage or assign the responsibility.
An employer may not be held liable where the employee has deviated from his/her duties or responsibilities.