Crime scene: 162 mystery solving puzzles to find out who the murderer is

Chapter 35 The Secret Tunnel Under the Bed
Zhu Xiaoming sent the painting to Mr. Jiang's apartment. He was surprised to find that the door was open. When he entered the hall, he suddenly heard painful groans coming from the bedroom. He broke into the room and couldn't help being surprised. , It turned out that a policeman was injured and fell to the ground, but he looked around but found no trace of Mr. Jiang.

Seeing this scene, Zhu Xiaoming stood there helpless, and the wounded policeman reluctantly let out a weak voice: "Secret... tunnel...escape...gone..." As he spoke, he pointed to the bottom of the bed.

Zhu Xiaoming found a board, probably the person escaped from here.

"Flip...board...switch...mi...le..." The policeman died after saying this.

Zhu Xiaoming got under the bed, trying to lift the board, but tried his best, but couldn't.

"Switch...Miller...Did he say that the switch was set behind that painting by Miller?" This replica of Miller's "The Sower" was sent by Zhu Xiaoming last time; he went to the piano and put the picture Take it off, look at the whitewashed walls, look left and right, but you can't find the switch.

The competitive Zhu Xiaoming, in order to find the switch of the secret tunnel, completely forgot to inform the police about it.

"Where is the secret switch installed?"

When he was anxious and irritable, he suddenly had an idea: "Aha! So it is here."

This secret tunnel leads directly to the sewer in the back alley, and the murderer probably escaped without a trace along the sewer.

Smart Zhu Xiaoming, where did he find this secret tunnel switch?Can you solve the mystery?
[Answer] The keyboard on the piano is a secret switch.Zhu Xiaoming found that there was a piano in the room, so he felt suspicious.He calmed down and thought about it for a while, and then he solved the mystery of the switch of the secret tunnel.It turned out that the "Miller" mentioned by the dying policeman did not refer to Miller's paintings, but the two syllables 3 and 2 on the piano.After pressing the two keyboards "3, 2" on the piano, the door of the secret tunnel is naturally opened.

(End of this chapter)