Mr. REVILL. Yes, sir; Lee. And this was told to me by a colored employee of the School Book Depository. Myself and Lieutenant Frank Dyson took charge of the search of the building and we must have had 75 or 80 men in the building assisting in this search. I talked to a Negro---- Mr. DULLES. Were you in charge of that? Mr. REVILL. Yes, sir; I was in charge of that phase of the search. I talked to a Negro by the name of Givens, and we had handled this person in the past for marijuana violations and I recognized him and in talking to him I asked him if he had been on the sixth floor, and as well as I recall, and Detective Brian was present at this same time he said, yes, that he had observed Mr. Lee, over by this window. Well, I asked him who Mr. Lee was, he said, "It is a white boy." He didn't know his full name. So, I turned this Givens individual over to one of our Negro detectives and told him to take him to Captain Fritz for interrogation, and while going to the city hall, or the police station I passed this detective and Givens, and they came into the homicide and robbery bureau shortly after Hosty and I did, so I am sure Captain Fritz did talk to Mr. Givens. Mr. RANKIN. When did you learn that Oswald had been arrested? Mr. REVILL. I really don't know, sir. Because time, we were all shocked that this thing had happened in our city and I personally felt that maybe a sense of responsibility, maybe we could have done more to prevent this thing. I just don't know when I heard that he had been arrested. Mr. RANKIN. Did you know it by the time you went to Lieutenant Wells' office? Mr. REVILL. No, sir; I did not. He may have been in the office at that time. Mr. RANKIN. You didn't know that Oswald was already in the police department? Mr. REVILL. No, sir; I did not. I had been in this building since word came of the shots being fired until about 2:30, 2:35, and at that time I decided that my unit could possibly do more at our office where we kept all of our files, cataloging these people, the suspects that were running through my mind at that time. So, I was, I put out a call for all of the intelligence unit personnel to meet me at the office and I got no reply to this because they were all up in the special service bureau. We had been assigned to the Trade Mart, and two or three of my officers had taken into custody four or five of these picket carriers, and we did this more for protection than anything else because after the word came of the assassination, well, I am afraid they would have been mobbed, and they were all up in the special service bureau booking these prisoners at the time, and I decided we would stop by the special service bureau office, to report back to my captain and see if there was something we could do there. And as I pulled into the basement this conversation took place with Mr. Hosty.