Most of the time, when people talk about on-the-job injuries, they only discuss workplace injuries due to the employer, the injured employee, or by accident. An internal investigation or an independent investigation conducted by a Los Angeles workers compensation attorney to prevent bias into the matter will have to establish whether or not your coworker has taken all safety precautions while doing his/her job. For more info: www.williamkropach.com/city/Los-Angeles-Workers-Compensation-Attorney/