"Now I have a bigger job for you. I need someone to give an alibi."
"What could you possibly need an alibi for?"
"I said it before, no questions!"
"I need you to say that all day yesterday I was with you studying the fine craft of vegan burger preparation."
"If they ask about some victim's blood on my cheese grater, paring knife, pizza cutter, spatula, or my gun - say I've been looking for those items for days!"
"*gulp* I don't get paid enough for this!"
"This intership is providing you with priceless experience!"