Who's the murderer!?

ONLY FOR INDIANS

A man was found murdered in his house on 2nd October 2004, 11:37 am.

There are 4 suspects: his wife, his servant, his gardener, and his driver.

You are the police. You ask the same question to all four of them and get some answers:

The question is: Where were you when the murder took place?

1. Wife: I was in the kitchen, preparing for today's party .

2. Servant: I was at the wine shop for tonight's party.

3. Driver: I was bringing some stuff from the market for the same party.

4. Gardener: I was flowering the plants.

Whom would you arrest based on this information?