Refers to suspicion of a crime, often used in legal and news contexts. As a suffix, it attaches to nouns indicating the type of crime (e.g., 殺人容疑).
He was arrested on suspicion of murder.
The police are pursuing the man on suspicion of theft.
The man was arrested on suspicion of murder.
Suspicion has fallen on him too.
The defendant has consistently denied the charges.
Evidence accumulated and the suspicion was confirmed.
容疑 specifically means suspicion of a crime (as in 容疑者), whereas 疑惑 can refer to any kind of doubt, including political or business scandals.
容疑 refers to the suspicion itself, while 被疑者 refers to the person who is suspected.
suspect
Compound of 容 (form, appearance) and 疑 (doubt, suspicion). The exact historical derivation is uncertain, but the combination conveys the idea of 'appearance of doubt' or 'suspicion'.