An incompetent officer with 無能
Kanji Explanation: Ability and capability with 能

Police detective Yokomizo isn’t about to let Sasai, his prime murder suspect, leave. Sasai reminds the officer that he has photographic proof that he wasn’t near the victim at the time of the murder. He calls for Detective Mouri to back him up.
- 笹井:
- 「名探偵
( のあなたからもいってやってくださいよ。 この刑事( がいかに無能( かという事( を…」- “You, the great detective, should tell him yourself. Just how incompetent this police detective is...”
Key Points
無能
( = incompetent, lacking abilityHere 無能
( is a direct insult aimed at the detective.It strongly says he is useless at his job.