How did Martin Torres react to the death of Emilio, his nephew? How does he view the actions he was planning to take

He was grieving and started plotting revenge.

He viewed the actions he was planning to take as "taking care of business".

Explanation:

Martin Torres is the uncle of teenager who was shot and killed as he was walking down a street. The news of his nephew's death devastated him, the two having been close, and in his grief he plotted to avenge his nephew's death.

Having formerly belonged to a gang, he thought of his planned actions as just taking care of business and going hunting.