Помогите перевести в пассивный залог The detective is investigating this serious criminal case now, he is still collecting evidence against criminals.

Вопрос школьника по предмету Английский язык

Помогите перевести в пассивный залог
The detective is investigating this serious criminal case now, he is still collecting evidence against criminals.

Ответ учителя по предмету Английский язык

This serious criminal case is being investigated by the detective now,evidence against criminals is still being collected by him.