Garu kamma explanation

garu-kamma (weighty karma) - if one has killed one's mother or father, for example. These types of karma outweigh any other possible result; one who has performed these at some time in this life cannot help but go to hell in their next existence. This is a quote from Ven Yuttadhammos answer. My question is does garu kamma relate to murder of ones parents or could it also be a reason to shame them which drives them to suicide?