A policeman was interrogating 3 blondes

 who were training to become detectives. 

To test their skills in recognizing a suspect,

 he shows the first blonde a picture for 5 seconds

 and then hides it. 

 "This is  your suspect, how would you recognize him?"

The first blonde answers, 

"That's easy, we'll catch him fast because he

only has one eye!"

The policeman says, 

"Well...uh...that's because the picture shows his profile."

 Slightly flustered by this ridiculous response,

 he flashes the picture for 5 seconds at the second blonde 

and asks her,  "This is your suspect,

how would you recognize him?"

The second blonde giggles, flips her hair and says, 

"Ha! He'd be too easy to catch because he only has one ear!"

The policeman angrily responds, 

"What's the matter with you  two?!?

Of course only one eye and one ear are SHOWING 

because it's a pictureof his profile!!  

Is that the best answer you can come up with?

Extremely frustrated at this point, 

he shows the picture to the third

blonde  and in a very testy voice asks, 

"This is your suspect, how would you recognize him?" 

 He quickly adds"...think hard before 

giving me a stupid answer."

The blonde looks at the picture intently 

for a moment and says,

"Hmmmm...the suspect wears contact lenses."

The policeman is surprised and speechless 

because he really  doesn't know himself 

if the suspect wears contacts or not. 

"Well, that's an interesting answer...

wait here for a few minutes while I check his file 

and I'll get back to you on that."  

He leaves the room and goes to his office, 

checks the suspect's file in his computer, 

and comes back with a beaming smile on his face.

"Wow!  I can't believe it...it's TRUE!  

The suspect does infact wear contact lenses.  

Good work!  

How were you able to make such an astute

observation?

That's easy," the blonde replied.  

"He can't wear regular glasses 

because  he only has one eye and one ear."