Suspect
noun
I have a suspicion (容疑) about someone. That someone is my main suspect.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Will help to be able to read 容疑 first, though.
容疑者は、自分の罪を認めた。
The suspect admitted his guilt.
その容疑者は、十代の若者たちにオプティミズムのメッセージを伝えた。
The suspect conveyed a message of optimism to the teenagers.
サトシはみたらし団子毒殺事件の容疑者として指名手配されたらしいよ。
Apparently Satoshi is wanted as a suspect in the Sweet Dumpling Poisoning Case.