Steph raised an eyebrow and pointed her spoon at him. She hadn't been following him. She was following the suit, who just happened to be following him. However, hee did have a "Point."
Listening, Steph nodded at his assessment. She could always make her own investigation but she was going to take his word on it for now. "One. I don't know how you learned all that but it probably involved unconventional (and probably illegal) Googling so I'm going to pretend that I didn't hear that part.
"Two. You have a screw loose if you thought for a moment that you could trap him--" Steph tapped the symbol twice, "--when even SHIELD can't pin him down. So no, you didn't fail. At least not by yourself. And finally, why aren't you in protective custody if you're in danger?"
Steph did not mention that Batman (and Batgirl) had other means...