Atzerodt Confession

[Gene C]

Correct me if I'm wrong but doesn't that describe Powell? Why would he be there asking for Johnson?

You'd think the detectives would ask the same question.
Why would Powell be at the Navy Yard bridge if he's headed for Baltimore.
Doesn't seem like getting access to Johnson was all that difficult, if you could find him.

Can't say I find much validity to the conspiracy having so many involved, it the best you can find to kill the VP was Atz.
You'd think they would have him back in southern MD to help Booth & company escape across the river, and have someone else of the many supposed conspirators take care of Johnson.