Apparently there is something already regarding justifiable homocide, but this is to be extended.
I am not sure what the old laws covered, but the new ones seems to be aimed at protecting fetuses, and is said to be in order to lawfully kill abourtion doctors. Whether there is more to this I do not know, and below is all I could get my %&#%"!! pc to copy, I could not get the link but the article is in care2's 'causes and news' section and in 'civil rights.'
"South Dakota may have killed their "justifiable homicide" bill that many fear opens a legal loophole that would allow the killing of abortion doctors. But the trend is spreading -- Nebraska and now Iowa have introduced their own bills with even stronger language.
A law under consideration in South Dakota would expand the definition of "justifiable homicide" to include killings that are intended to prevent harm to a fetus—a move that could make it legal to kill doctors who perform abortions. The Republican-backed legislation, House Bill 1171, has passed out of committee on a nine-to-three party-line vote, and is expected to face a floor vote in the state's GOP-dominated House of Representatives soon."