Assists in a bad way

• Acts as a lookout, say
• Works with a hood, say
• Aids and _____
• Helps at a heist
• Helps do wrong
• Conspires in crime
• Serves as a lookout for, say
• Launders money, e.g
• Helps in the worst way

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