"Andrew Johnson had been suspected by many people of being concerned in the plans of Booth against the life of Lincoln or at least cognizant of them. A committee of which I was the head, felt it their duty to make a secret investigation of that matter, and we did our duty in that regard most thoroughly. Speaking for myself I think I ought to say that there was no reliable evidence at all to convince a prudent and responsible man that there was any ground for the suspicions entertained against Johnson."