They frame the kings guards outside his bedroom that night by leaving the bloodied dagger and blood on their drunken bodies.
Macbeth and Lady Macbeth plan to murder King Duncan by inviting him to their castle as guests, then waiting until he is asleep to kill him. They plan to frame the chamberlains for the murder by planting the murder weapons on them.
Lady Macbeth takes the bloody dagger back to Duncan's room in order to frame the King's guards for his murder.
In Act 2 of Macbeth, King Duncan is murdered by Macbeth in his sleep. Lady Macbeth also kills the two sleeping guards to frame them for the murder.
After the murder of King Duncan it was planned that Macbeth would place the bloody daggers next to the drugged soldiers that were supposed to be keeping watch over King Duncan. This was to be done in order to make the people of Scotland believe that the soldiers had executed the murder.
The king's servants who are blamed for King Duncan's murder are killed by Macbeth as part of his plan to frame them for the crime. Macbeth does this to shift suspicion away from himself and Lady Macbeth, who are the true perpetrators of the murder.
Lady Macbeth drugs the guards stationed outside King Duncan's chamber to ensure they are unconscious and unable to interfere with her plan to frame them for Duncan's murder. This allows Macbeth to easily access Duncan's chamber and carry out the assassination.
Duncan's two grooms, who did not survive him by much.
Macbeth claimed to have killed King Duncan's guards because he wanted to frame them for the murder of Duncan, thus diverting suspicion away from himself. This was part of his plan to become king and consolidate power.
Lady Macbeth enters the King's room to plant the daggers on the guards after she has drugged them. This is part of the plan she and Macbeth devised to frame the guards for the murder of King Duncan.
He forgot that: what he is doing, it's gonna come back baby!
Do you mean, "Who was accused of murdering Duncan"? The grooms in Duncan's chamber, for a start. Then Malcolm and Donalbain were accused of paying the grooms to commit the murder.
The Macbeths' plan was to blame Duncan's bodyguards for the murder of Duncan. To this end Lady M. smeared their faces with blood and they stole the bodyguards' daggers to commit the murder. But Macbeth was worried that when they woke up and denied having anything to do with the murder (They could reasonably point out that they had been too drunk to do anything) people might believe them. Therefore he made sure they had no chance to deny the murder.