MR LAX
The question is that he and his comrades, as he testified, were going to take her to the office, not necessarily for questioning, they were going to take her to the office first, to report, as I understood it.  Then he of his own according decided well in view of the order, and in view of the other information he already knew, that was his evidence, he was going to kill her there and then.  Because he was worried the police might catch them on the way.