You will be given a definition of a task first, then some input of the task.
In this task, you will be shown an extract from a movie plot and a question. You need to provide the correct answer for it. Short answers containing words that are present in the passage are preferred.

A Boston bank is the next hit of a group of crooks, and they turn to old-timer Eddie "Fingers" Coyle (Robert Mitchum) to get guns for their job. Third-time loser, Eddie is up for a long jail sentence and is looking for a way out because of his age, and children and wife to worry about so he cooperates with detective Foley (Richard Jordan) to become informer. Bartender Dillon (Peter Boyle) is also informing to Foley and he is contracted by a crime boss to assassinate Eddie after a job goes bad. Eddie is desperate to find something to negotiate with for a suspension of his jail term, but Foley won't cooperate. Dillon takes Eddie out for one last night on the town before his forced retirement., Question: What does Eddie do to avoid a long jail sentence?
Output:
Answer: He becomes an informer.