Let's Tease Your Brain

While I was browsing the Internet randomly last night I came upon this logic and math puzzle site. Here are a few relatively easy but fun puzzles to solve. Here are a couple of them, localized to fit us paradise islanders. See if you guys can solve them in quick time and let me know the answers. I'll publish all the comments after a couple of days.

(1)
The newly made crown of the King Rajapakse was stolen even before he got to set his hands on it and was furious beyond imagination. His royal police set to work immediately and apprehended five suspects in no time and were questioned. Each of them gave two statements, and a heavenly voice told the chief investigator that exactly one statement by each one of them was false, while the other was true. Following are the statements given by each of the suspects.

Ranil:
It wasn't Somawansha
It was Mangala

Mangala:
It wasn't Wimal
It wasn't Somawansha

Wimal:
It was Somawansha
It wasn't Ranil

Rathnasiri:
It was Wimal
It was Mangala

Somawansha:
It was Rathnasiri
It wasn't Ranil

Who stole the crown?


(2)
The next time, throne of the King was stolen. Usual procedure followed, and this time six suspects were apprehended. This time only four people dared to lie, and each of the four people who lied told only one false statement each. All the other statements were true. Following are the statements.

Mervin said:
It wasn't Ranil
It wasn't Wimal
It wasn't Rathnasiri

Ranil said:
It wasn't Mervin
It wasn't Mangala
It wasn't Rathnasiri

Mangala said:
It wasn't Ranil
It wasn't Somawansha
It wasn't Rathnasiri

Wimal said:
It wasn't Mervin
It wasn't Somawansha
It wasn't Mangala

Rathnasiri said:
It wasn't Mangala
It wasn't Wimal
It wasn't Somawansha

Somawansha said:
It wasn't Mangala
It wasn't Wimal
It wasn't Mervin

Who stole the throne? To give you a little clue, though this may seem difficult than the previous one, it is not. It might even take less time than the previous one.