[Section 210.6. Sentence of Death for Murder;  Further Proceedings to Determine Sentence].

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 (3) Aggravating Circumstances.

  (a) The murder was committed by a convict under sentence of imprisonment.

  (b) The defendant was previously convicted of another murder or of a felony involving the use or threat of violence to the person.

  (c) At the time the murder was committed the defendant also committed another murder.

  (d) The defendant knowingly created a great risk of death to many persons.

  (e) The murder was committed while the defendant was engaged or was an accomplice in the commission of, or an attempt to commit, or flight after committing or attempting to commit robbery, rape or deviate sexual intercourse by force or threat of force, arson, burglary, or kidnapping.

  (f) The murder was committed for the purpose of avoiding or preventing a lawful arrest or effecting an escape from lawful custody.

  (g) The murder was committed for pecuniary gain.

  (h) The murder was especially heinous, atrocious or cruel, manifesting exceptional depravity.

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