Solve the mystery

Inspector Ixolite of the Yard was investigating a murder at Nottonmye Manor.
It was a difficult case, and Ixolite was completely stumped until he noticed a message sent to him by the killer cunningly hidden in a newspaper advertisement selling Car Licence Plates.
Inspector Ixolite thought about it for a while, and when he had solved the puzzle, immediately arrested the guilty man.

Q1) How Did Ixolite know the advert was a clue for him?

Q2) Solve the code and tell me who Ixolite arrested?

This is the newspaper advert, (Car licence plates for sale) that Inspector Ixolite saw.

Plates For Sale;

[W 05 NWO]
[H 13 HSR ]
[O 05 EBM]
[D 08 UNE]
[U 10 HTY]
[N 04 BRE]
[N 16 TTE]
[I 26 LHC ]
[T 10 AEE]
[I 26 CNA]
[X 22 VDA]

i found the answer for Q1. If you see that advertisement first letter for each car(see it in vertical), you can get the word. WHODUNNITIX

WHO DUNN IT IX - This is how he found that adver has a clue.

So remaining two columns contains the clue for the criminal. But i can't get that clue..

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suresh

u r right in getting the first part..for the second part let me giv a simple

clue

eulc:)

Suvi gave the useful clue...also it was very tough to find the answer...

Here is the answer...

look at the clue..he wrote the letters in descending order. Take the third column and put it in a reverse order. You can get the following.

advanceeachletterbythenumbershown

From the above i will find the following sentence...

advance each letter by the number shown

now take out the first and second column and put the advance letters for each number. So you can get

w = b, h = u, o = t, d = l, u = e, n = r, n = d, i = i, t = d, i = i, x = t

Finally the sentence is...
butler did it (this was one of toughest puzzle i have seen it)

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suresh