Sec. 3. (a) A person who knowingly or intentionally:
(1) kills another human being; or
(2) except as provided in section 6.5 of this chapter, kills a fetus in any stage of development;
while acting under sudden heat commits voluntary manslaughter, a Level 2 felony.
(b) The existence of sudden heat is a mitigating factor that reduces what otherwise would be murder under section 1(1) of this chapter to voluntary manslaughter.