suspect vs. be suspicious of
what's the difference between suspect and be suspicious of ?

Question

Answer

A suspect has perhaps committed a crime.
A suspicious person is the person suspecting that something is suspicious about someone else.

Suspicious: Having or showing a cautious distrust of someone or something.
Suspect: Not to be relied on or trusted; possibly dangerous or false

"I suspect (that)..." 
"I am suspicious (of)..."