"unlikely suspect" is a correct and usable phrase in written English.
It can be used when describing someone who is not typically expected to be involved in a certain situation or crime. Example: The police were shocked when, after months of investigation, the unlikely suspect was finally arrested for the murder of the wealthy businessman.
There's another unlikely suspect jumping into the fray: Googlers.
Bruner suggested Francis was an unlikely suspect for a murder that might have been driven by religious zealotry.
To them Al Qaeda's leader, Osama bin Laden -- from a remote perch in Afghanistan -- is an unlikely suspect in the terrorism of Sept. 11.
It was a further 20 minutes before another chance was created and Robert was the unlikely suspect, though he did so with a dive.
ALLISON K. SCHIEFFELIN seems an unlikely suspect to have set fire to Morgan Stanley's carefully constructed image as a bastion of Wall Street professionalism and a true meritocracy.
In her "The Wire in the Blood", psychological profiling is turned on its head when, in a classroom exercise, trainee police profilers discover a hitherto unsuspected but believable series of murders and an unlikely suspect.
From almost the moment the news broke, many fellow students said the boys were unlikely suspects.
That means you have to look for the unlikely suspects if you really want to find the true killer.
This is especially so for "unlikely suspects"—Republicans and independents who otherwise have more traditionally conservative views.
The Republican debates have become an ongoing suspense drama in which viewers try to guess which of these unlikely suspects will actually become a presidential nominee.
Security experts call Israel a "recruited society," a nation mobilized by harsh experience to guard against possible attack at any time, even from unlikely suspects.
