The so-called arrest means that the criminal suspect has made a guilty confession, that is, he admits the fact that he took bribes, and the procuratorate can arrest him. Your family is very smart. While admitting that you took bribes, you only confessed events without facts, that is, the guilty confessed innocence. This will usually be withdrawn, and people can be released without evidence.
However, if other evidence or other guilty confessions are supplemented, the amount of crimes will be combined, so it is said that we should catch the thief.