Возвращение Мухтара S11E29 - Обеды в офис

The director of the company, Fokin, found four unconscious employees in the office and... an empty safe where the money was stored. The accountant, who came to her senses, told about the incident: in her opinion, sleeping pills were mixed into the lunches delivered by the messenger at the request of the staff. But Mukhtar found the syringe with which the sleeping pills were injected. Was it really done by a messenger right in the office?!