Here's why:
* Gender-neutral language: English strives towards gender-neutral language, and using "murderer" applies equally to both men and women.
* Avoiding stereotypes: Creating a separate term could reinforce gender stereotypes.
* Variety in usage: While some might use "murderess" for a female murderer, it's not widely used and can sound archaic or even sensationalized.
Alternatives:
* "Killer": This term is gender-neutral and widely used to refer to someone who commits murder.
* "The person who killed [victim's name]": This is a clear and direct way to refer to the perpetrator without specifying gender.
* "The suspect": This is particularly appropriate when discussing a crime under investigation.
Ultimately, it's best to use language that is clear, neutral, and avoids gender stereotypes.