What is the difference between murder and aggravated murder?

Murder is the act of killing another human being with "malice aforethought". Malice aforethought is defined to be the intent to kill or to inflict bodily injury, either expressed or implied. If a deadly weapon is used, intent to kill will necessarily be implied by a court of law.

Aggrivated Murder is Murder in the first degree which is confined to homicide committed by poison and other killings committed with a premeditated design and to those which accompany the commission of atrocious felonies.

Improved: Aggrivated murder is when the defendent is paid or receives a value to commit an act of murder in the 1st degree.