WOW!! some heavy (and for the most part correct) reaction going on here! I'm sorry to hear that it took the loss of someones life lead to this decision.
My big question in this is: If she had to, could she kill another person ? If not, then she really shouldn't get a gun. Conceivably it could be used as a weapon against her. Taking a life is not and should never be a light thing!
If for home protection, have you considered a shotgun? My sisters choice (pump).
If I were wearing your shoes, I'd take her to a shop that also has a range, and she could try different ones. And then have the shop also throw in a safety course/ range instruction with purchase. And then buy her a membership with the NRA and get her involved with their safety programs and Women's groups. 'While the door is open', help her recognize that being PRO-gun is a good thing!
Wheel guns are easiest in function, get a .357 that fits but only load it up with low power .38. Work up to .38 +P. Next thing you know she will prefer a 1911 service, like my wife.
As far as local laws in her area, the best advice has all ready been given; contact the local Sheriffs office. Best of luck-