(a) Voluntary manslaughter is knowingly killing a human being committed:

(1) Upon a sudden quarrel or in the heat of passion; or

(2) upon an unreasonable but honest belief that circumstances existed that justified use of deadly force under Kan. Stat. Ann. § 21-5222, 21-5223 or 21-5225, and amendments thereto.

(b) Voluntary manslaughter is a severity level 3, person felony.