My question involves criminal law for the state of: Florida

my daughters 23 year old boyfriend got drunk and did something very stupid after they had a argument and he esponded to a online ad for sex with Mom and daughter and it was a sex sting. He was arrested and released the next day to his father who immediately sent him away for 9 months of rehab (he had been sober for 14 months before this). During this time his father hired a lawyer and the lawyer only spoke to him on the phone and through the rehab counselor. The lawyer negotiated only one plea bargain of 3.6 years in jail (he said down from 5 years) and 10 years probation (and he will always be a registered sex offender). The lawyer told him it was a one time shot or go in front of a jury where he could get the maximum of 10 years in jail. This was his first offense of anything other than one speeding ticket. He actually met the lawyer for the first time the day before court. I know this family very well and believe that he was not given a full explanation of the options (refusing the first plea) as his parents encouraged him to take this and just get it all over with. Since then several other men arrested in the exact same sting with basically his situation (one was 19 and the other 23) who also had no priors records have had much better results. Their records now show Adjudication Withheld and that they have to complete their probation but that if they do they will not have to be registered sex offenders. One other man age 31 had his charges all dropped. Others have been sentenced guilty and others the case is still open. So far the plea deal he took is the most severe punishment of anyone else arrested in this particular sting and yet he only had one charge against him and others had several. We are open to suggestions. Suggesting that my daughter simple remove herself from the situation isn't an option at this time as she believes strongly in his innocence of not being a sex offender and instead just being guilty of relapsing into drinking and behaving stupidly at that time.