Slipped

The spy slipped the secret code into the message, without anyone realizing it.

The secret plan was slipped into a confidential memo, without anyone noticing.

The bag slipped off her shoulder and spilled its contents onto the sidewalk.

The prisoner slipped through the window and escaped from the high-security prison.

He slipped into his pajamas and crawled into bed.

The suspect slipped away from the police, disappearing into the crowd.

He slipped a piece of paper into the envelope and sealed it shut.

The spy slipped past the guard and entered the building undetected.

The criminal slipped out of the handcuffs and escaped from custody.

The city's crime rate slipped after the police department underwent budget cuts.