Be careful about the order you do these connected quests, it's very easy to mess something up.
Be sure to talk to Marcus between completing one thing and doing the next thing.
Talk to Lieutenant Robin yourself, don't let Marcus talk to him for you.
Don't get the quest from Trevor until you've done it. He's missing the dialog for later.
The depot is in the sewer. You probably saw it if you've already been there. What's important is the person that appears when you're assigned to look for it.
Oh ok. I will have to check out the sewers and thanks for the warnings.
