Fratricide is the killing of ones brother or sister So you would call him a( Murderer )
A girl who commits fratricide has the right of execution.
A person who commits a robbery is known as a robber or a thief.
A tortfeasor A tortfeasor
A person who commits a crime is known as a criminal.
A person who betrays his country - in other words: commits treason - is called a traitor.
A jerk. fratricide = the killing of one's brother
A person who commits a homicide is a murderer.
A person who commits sin is called a sinner.
A jerk. fratricide = the killing of one's brother
A tortfeasor. The tort refers to the body of the law that will allow an injured person to get compensation from the person who caused the injury (the tortfeasor). This comes from the Latin word tortus, meaning "wrong".
A murderer or perhaps a Kinslayer. The term you are probably looking for is "fratricide"