First of two appearances by Detective Mike Sandoval played by Nicholas Gonzalez. He would appear again in Ghost (2005), six episodes later.
At the beginning, Olivia is at Ken Randall's apartment, asking for Kwasi Tutuola.
This is when it is revealed that He uses his Mom's Maiden name Randall, and goes by the name Ken Randall.
There is a detective named Mike Sandoval in this episode. In Power (2014) there's a corrupt FBI Assistant US Attorney named Mike Sandoval. Diane Neal (ADA Casey Novak) would go on to appear in 4 season 1 episodes of Power, a season before the character made his first appearance.