suspect
sus-pect
verb
To believe something is true or likely, especially something bad.
"I suspect he is lying about his alibi."
noun
A person believed to have committed a crime or offence.
"Police questioned the main suspect for hours."
Thesaurus
Synonyms: mistrust, distrust, defendant, surmise, suspicious, questionable, fishy, funny, shady
Antonyms: complainant, plaintiff, trust