"The key was found inside the study after the locked door was burst open.

It was your father who found it, on the floor.

At least, he pretended to find it there.

It was your father who started the suicide theory." He paused, then added in a smooth reflective voice, "Really, the whole thing was very ingenious.

It reflects much credit on both of you." Charles spoke with an air of sudden decision.
"My father did these things to shield me," he said.