Final answer:
Carnegie blames Henry C. Frick for the death of his mentor at the Homestead factory.
Step-by-step explanation:
In the case of Carnegie's mentor, Andrew Carnegie blamed Henry C. Frick for his death. Frick was the manager of the Homestead factory and had strong anti-union views. When the union contract was up for renewal in 1892, Frick ordered a lockout of the workers, which led to a violent clash between the Pinkerton detectives hired by Frick and the striking workers. This clash resulted in multiple deaths. Although Carnegie was not directly involved in the incident, he blamed Frick for mishandling the negotiations and thus held him responsible for his mentor's death.