Rena pays a visit to Donraku and Kabasawa. Sato tries to tail Dobu to get his stolen photos back, but is caught in the process. 
I've already investigated that thoroughly.
.سبق وحقّقت في ذلك بدقّة
Äh, ich habe ihn längst
gründlich untersucht.
Ya lo investigué bien.
Ya lo he investigado concienzudamente.
Ça ira, j’ai tout ce qu’il me faut.
Ho già indagato a fondo su di lui.
Eu já investiguei tudo quanto a isso.
Спасибо, но я уже всё о нём знаю.