The court is being shown a floor plan of Oscar Pistorius' home. Prosecutors are trying to reconstruct events.
Pistorius' lawyers said he went to the bathroom without his prostheses, and that the angle of bullets is significant. An investigator says it seemed that the shots were fired "downwards".
Once you're in the bathroom, "there's no way out," says investigating officer Hilton Botha.
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The blast happened in the basement of the plant’s rod and bar mill, where five men were also injured.
Cumbria Police will examine the computer to see if it is the missing one used by the young girl’s father on the night she died.
The former US first lady arrived in Edinburgh on Tuesday.