Mystery & Murder Riddles.

2: My Psychotic Brother.

A few years ago,my older brother went crazy. He stabbed my sister to death and attacked my parents, but the police managed to subdue him before he could kill them too.

He's been in a mental hospital ever since and we never visit him.

This morning we got a letter from him through the mail. The postmark was yesterday,so I opened it and inside I found a strange note,which read:

"Tonight the wind blows colder still. All I know is darkness,never light the pain will break strongest hearts. My dreams still escape my grasps."

I couldn't make sense of it,so I went to the kitchen and gave it to my mother. As soon as she finished reading it. Her face went pale and the note slipped from her fingers. She rushed to the front door and started screaming.

Why?