Related Clues:

• What an accused perpetrator needs
• Cover, so to speak
• Perp's story
• Arsenic, for one
• It may help one get away with murder
• Weapon alternative in mysteries
• Suspect's trump card
• Grafton's "A"
• Out for a trial
• Zombie, essentially
• "I was at a movie when it happened," e.g.
• Proof of being elsewhere when a crime is committed
• Proof of being elsewhere at the time of a crime.
• If taken, it can harm or kill
• I spoon up the lethal substance