suspect of

suspect (someone or something) of (something)

To consider or believe that someone or something is guilty of some crime or wrongdoing but lacking evidence to prove it. I began to suspect him of having an affair when he started leaving the house at odd hours and was evasive when I asked him where he was going. The feds suspect the company of fraud, but they have to build a portfolio of evidence before they can strike.
See also: of, suspect
Farlex Dictionary of Idioms.

suspect someone of something

to think or believe that someone has done something. I suspect the clerk of stealing. Ted was suspected of leaving the door unlocked when he left last Friday.
See also: of, suspect
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • content
  • content (oneself) with (someone or something)
  • content oneself with
  • ain’t long enough
  • ain't long enough
  • remark on
  • remark on (someone or something)
  • in the hole for (something)
  • in want of (something)
  • in want of something
References in periodicals archive
The police have referred the three suspects to the forensic laboratory for suspect of using drugs.
One experienced investigator provides advice for interviewing the suspect of a particularly serious crime, "Remember, he has to go on living with himself." (26)