Secures bank blueprints for, maybe

• Assists with a felony
• Looks out for, at a heist
• Aids and ___
• Sticks up for?
• Runs interference for the offense?
• Drives the getaway car for, say
• Supports in skullduggery
• Plays henchman
• Lends a hand to a hood

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: abet )