One moves to lead in police patrols and gets involved in crime

• Helps (criminal)
• Helps a certain hacker, say
• The pack in a six-pack
• Helps, especially in wrong doing
• Conspires with, perhaps
• Acts as a shill for, say
• Is a fence for
• Helps with something illegal
• Covers for a crook, say

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