She was still having a hard time with her client's death, and he completely understood. He'd felt responsible for deaths before. He tried to reach out to her and tell her that, but she was deep in her own head and he wasn't sure how much got through. He understood that, too, although he was disappointed he couldn't share his experiences with her. It was funny, because she was so sensitive to other people's emotional states, but with him she either didn't notice, or pointedly ignored, his efforts to connect. On some level, she always had her guard up around him, and it was his own fault.
She told him about the flash drive, but wouldn't give it to him. That stung a little (he couldn't stop himself from asking her if she trusted him), but the client had entrusted it to her, and she took that responsibility very seriously. She didn't want to take any risks that something could happen. He knew how that went. After the drive briefly went missing in her office the next day, she gave it to him for safekeeping, which made him feel a little better.
He didn't take it to the FBI. That would have been a betrayal, and he also needed to figure out how to handle all the moving pieces. He needed to get the information to the FBI, but equally important was making sure that Dani got the closure and answers she needed. He also didn't want her to end up involved in the investigation. She couldn't possibly know how the Feds locked on to their witnesses, and how quick they were to threaten them. The good news was that it looked like they had taken a major step forward in the investigation. Maybe he could make his now three-week deadline after all, and then he could move on with his life. He didn't bother to ask himself why that didn't seem like good news anymore.