The club's hierarchy have decided that the 27-year-old should be allowed to continue playing for the Black Cats until the outcome of his case has been decided.
A club statement on Friday morning read: "Following yesterday's statement from Durham Constabulary, the club recognises that the formal legal process must take its course and whilst our position remains unchanged, we will keep the matter under review.
"The club will not be making any further comment."
Advocaat said: "He still has to come in (to train). But, in principle, if he feels okay he will be part of the squad.
"It's not difficult to deal with. The club have made a statement and I stand behind that and I will see what the future will bring."