Complex sentence: Trent refuses to carry firearms in his role as a private investigator, and Walker is concerned, so he offers Trent a small pouch containing several shuriken (popularly known as "throwing stars") and asks him to carry them on his person for protection.
Split into simpler sentences: Trent refuses to carry firearms in his role as a private investigator, and Walker is concerned. Walker offers Trent a small pouch containing several shuriken (popularly known as "throwing stars") and asks him to carry them on his person for protection.