Thank you for the opportunity to help you with your question!
Abuse is a very strange action and have multiple of warning signs.
One, wrong accusations. if your colleague or partner accuses you wrongly ,be sure there's an abuse problem. If he/she has had abused or killed some domestic animals with no agreement, be alert.
Another sign is being jealousy with petty issues like when you chat with friends and relatives. also petty disagreements and violence behaviors like breaking of objects, which is also accompanied by uncontrollable anger.
In dealing with an abused adult, you should follow certain steps:One make sure that you are safe as you face the individual.
Two, make a clear introduction or approach that will not scare or bring conflict between you and the person.
Next, have a safety plan, for example, don't meet in a insecure place. make sure there's enough safety for both of you.
Explain in details and in a polite way the consequences of the activities done during the abuse.
Lastly, have a final word to the individual that should bring a positive outcome.
Please let me know if you need any clarification. I'm always happy to answer your questions.