First, criminal suspects are generally in detention centers, and no one can meet them except defense lawyers;
Ask a lawyer early, there will be communication inside and outside, so that people inside will be more calm;
Second, the main role of lawyers is to provide professional advice.
Please come early. The suspect can consult a lawyer about what he can say and what he can't admit casually. If the investigation is over, hire a lawyer again, and the transcripts are all ready. It's not easy to retract the confession, and the impression is not good.
Of course, if lawyers are here to make money, it is useless to invite them early or late. If you have a lawyer in charge, you can certainly provide better help. My suggestion is to hire a qualified lawyer. Don't just make money and then trick your family into doing your best.