The Legend of De Marco: Harlequin comics

Her little brother, Steven, has disappeared with a million euros in tow? Gracie, seeking a more detailed explanation of what happened, rushes to the company where her brother works. The president of the company, Rocco De Marco, meets with her to explain that her brother has stolen money from them and disappeared. Furthermore, they are also questioning her as if she is an accomplice to the crime. "You are an important person in relation to the incident. Until Steven appears, we would like you to stay in the company penthouse on the top floor of the building." Isn't this imprisonment?