My question involves criminal law for the state of: Hawaii

An employee was caught stealing from employer. (Taking money out the drawer) say X amount. In a meeting They were told the police had been contacted and had two options agree to pay back and never visit the store again or go to jail. They signed an agreement to pay the money back. They kept the last check which was 4 x the amount of X. Two weeks have passed and Theyve been warned by an old coworker that despite them not wanting to press charges the police are urging to make an arrest anyways. The owner was going to try and talk to them tmrw to stop it but they said it is a city matter now and doesn't matter. Is this true? Can They be arrested despite agreement outside of courts and restitution already been paid?