Riddles

Riddles

A rich man named James Leonard was murdered on a Sunday afternoon. At the time of the murder there was: the maid, the cook, the butler, the gardener and the wife. 

Maid: I was fixing the table. 

Cook: I was cooking breakfast. 

Butler: I was polishing the silverware and the dishes. 

Gardener: I was planting tomato seeds. 

Wife: I was reading a book. 

Who did it?

What kind of words are the following: Level, civic, madam and eye.

what is the shortest complete sentence in the English language?

 I arrive once in every second, once in every minute and once in every year. What am I?