Verified answer

2 Thepolice officer asked him if he had seen the robbers. 3 The police officer askedhim what the robbers were wearing* 4 The police officer asked him how hethought the robbers had got in 5 The police officer asked him what the robbershad taken 6 The police officer asked him if that had ever happened before.

* в 3 можно иhad been wearing, но were wearing точно правильно, тк were wearing(at the time of the robbery), т е есть точное время в прошлом