Baalke said they had a player targeted at #34, but he didn't know who would be available at #40 and they had a group of acceptable players. Harbaugh said that they had CB targeted during the draft but it didn't work out. "There definitely were times in the draft that we wanted cornerbacks. Had them targeted. But, that's the way it worked out."
We know that CB wasn't targeted with the picks in the 1st Reid, 2nd McDonald and 3rd Lemonier since they traded up for them. Also unlikely that they wanted a CB in the 4th. So I think that they may have picked CB Slay at #34 if they hadn't traded back to #40. Or perhaps Harbaugh wanted Hawthorne or McGee in the 5th?
I'm not sure that Carradine was their first choice, as Fangio said: "Carradine can only hope to be as good as Ray McDonald some day," Fangio said. "He's got a lot of climbing to do before I'm ready to compare him to Ray."