Fratricide (noun)

1. The act of killing one's brother.
2. The act of killing one's own brother.

Origin:

Fratricide from latin fratricida, from fratrem "brother" + -cida "killer".

Examples:

1. Fratricide is considered one of the most heinous crimes.
2. The fratricide was driven by jealousy.
3. The fratricide was punished by exile.
4. He was accused of committing fratricide.
5. The fratricide was a tragic event.