Question the suspects, or show them evidence to catch a lie. Every question, to anyone, uses one of your twenty.
Interview with
The victim's wife
“I spent the whole evening in the drawing room with my embroidery. Dr. Voss was playing Chopin next door, and I listened to her through the wall until poor Mr. Reed began shouting. I did not leave the room. Not once.”
Opening the interview room…
Pinned
Pin statements, answers and evidence to compare them side by side here.