"I am Akhuraau, from the order of the Sun and the Ankh, and this is Ihasma. As you can guess, the reasons for the death of Master Tetynefer are of interest for our order, and we want to investigate it."
Akhuraau shows the scroll to both officer Bak and Harmose, and uses the chance to silently concentrate on the vision of Horus-Re, to see if any of the gathered people are touched by evil, before turning to the chamberlain.
The visions of Horus-Re would likely not help to solve the murder, but maybe they could give hints on how to talk with the peoply already gathered.
"Harmose, did you notice anything strange on the days before the death of Master Tetynefer? What were you doing, and where, before being alerted to the death of the overseer?"