Who places the daggers with murdered servants in Macbeth?

The daggers are planted by Lady Macbeth, not placed. This is a crucial point in the play.

Lady Macbeth manipulates Macbeth into believing he has killed the King's guards himself, placing the daggers in their hands to make it look like a self-defense scenario.

This act of deception highlights the psychological manipulation that Lady Macbeth exerts over Macbeth, driving him deeper into guilt and paranoia.