we shouldn't judge him guilty before it's actually proven he is. sure this is a huge red flag. neymar is a weird person, so i deem pretty much everything is possible when it comes to him.
he's the guy who once said he would choose his father over his son and always finds a way to skip the match when it's close the day of his sister's birthday.
he's probably extremely naive so i wouldn't rule out that he's the victim of an extortion's attempt, on the other hand i personally don't rule out that he can do something extremely stupid, and also criminal.
for the record, in november 2017 robinho has been sentenced to 9 years of jail for a rape he committed in milano, while he played for milan, and he's still a player, as he plays for İstanbul Başakşehir in turkey. the judgement is not final yet as he of course appealed.