Helps, but not in a good way

• Provides with an alarm code, perhaps
• Helps a burglar
• Looks out for, as a partner in crime
• Helps with a holdup
• Helps with a plot
• Helps with a job
• Fences the loot, e.g
• Helps in a way one shouldn't
• Assists a crook

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