After Kogoro was turned unwittingly from the defendant 's witness to the prosecutor 's witness Kogoro conducts his own investigation .
After Kogoro was turned unwittingly from the defendant 's witness to the prosecutor 's witness Kogoro investigates Usami 's home while accompanied by Conan .
After Kogoro was turned unwittingly from the defendant 's witness to the prosecutor 's witness Kogoro conducts his own investigation and investigates Usami 's home while accompanied by Conan .