Considering Roux's affirmation that the next witness would need a whole day or more on the stand, I wonder if it is going to be the psychologist as to OP's state of mind at the time as well as to his general psychology of the effects of his disability, vulnerability, upbringing, etc. ?
Don't think for that length of time it could be an ear witness as Roux could have done the chief in an hour, like Nel did with the state's ear witnesses, and the cross left until after the break. Could be ballistics, pathologist or blood spatter but imo it would be unwise of them to call one of these straight away after Dixon... or could that be the real reason for wanting the break ?
I'd have thought the ballistics guy would be next purely to get Dixon's testimony out of the judge's head. I thought the DT had to give the state a list of their witnesses at some point but that doesn't seem to be the case.