Chuck Lorentz is found in the second volume of the "Agent Silent Death" Freedom Chronicle.
*** Spoiler - click to reveal ***This section of the game sees you plowing through the Paragon Film Studios after one of the men who ended up getting your husband killed. This is honestly my favorite section of this DLC because of the clichés involved in its story telling and how it harkens back to some real life events in Hollywood.
There are lots of good hiding spots in places like under set pieces and on catwalks to look out for.
YouTuber "Kreeper V" 's guide for this section begins at "3:13" and ends around "9:46."
Keep in mind its being played on Mein Leben in the video and you may need to adjust depending on the difficulty you're playing it on.