[FORUM GAME] Let's solve puzzles

[King_Dave]

Next:
As a Detective, you were called find out the cause of the death of a Bank Manager, who got killed in his office on his birthday, actually, you saw a deep hole at his chest, and a pen stained with blood in his hand..
Earlier, His wife had promised him a brand new car, a day before his birthday..

Five persons visited him before he died and they where suspected,

• Office cook
• His wife
• Bank Secretary
• Gate keeper
• His Driver
  

But you noticed the footsteps of the person shown on the floor, leading to his toilet, You traced the footsteps and saw a cheque of 10mill on the floor in the toilet.

Can you say the person that killed the Bank Manager?