Aids in a crime

• Aids and __ (helps in a crime)
• Aids in dirty deeds
• Clears the way for, say
• Helps feloniously
• Assists in wrongdoing
• Drives a getaway car
• Backs, as a front
• Hides evidence, e.g
• Helps, as a fugitive

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