The group figures out who stole the bike, but Aya isn't convinced they should take matters into their own hands.
According to Kozuka-kun's and 
Uesugi-kun's investigations,
وفقاً لتحرِّيات كوزوكا‏-‏كون وأويسوغي‏-‏كون‏،‏
Kozuka-kuns und 
Uesugi-kuns Ermittlungen zufolge …
Según la investigación 
de Kozuka-kun y Uesugi-kun,
Según la investigación 
de Kozuka-kun y Uesugi-kun,
D’après les recherches
de Kozuka et Uesugi,
Stando alle indagini di Kozuka e Uesugi,
Segundo a investigação
 do Kozuka e do Uesugi,