An idiom for a trap or legal dragnet that catches both guilty culprits and innocent bystanders.
mousetrap / indiscriminate snare catching both target and bystander
trap ya mtaani
"Doria hiyo ilikuwa mtego wa panya uliowakamata hata waliokuwa wanapita tu."
Translation: That police raid was a mousetrap that caught even those just passing by.