Answer Pleasee....

At her brother's funeral, a girl sees a mysterious looking man.
Tall, dark, beautifully shaped.
She stared at him all through the event, discretely though. No one was to know her thoughts.
It was her brothers funeral, afterall. She was to be mourning and saying goodbye.
Instead, she found herself loving a stranger, and yearnig to say "Hello".

As the funeral ended, she lost track of him.
The people at the site had crowded her to express their sympathies...
Secretly, she wished they hadn't.

The man was gone.
She was upset.
Her crush was lost.

Two days later, her sister died.
It was a murder.
Someone had killed her.

1.Who do you think killed her sister?
2.Why?