[ExcursionGuy84]

According to the story at the link,

The mrs. Alexander, the shooter, returned into the house with the gun in order to retrieve her vehicle keys after realizing she had left the hosue without them.

In this case, no physical evidence is presented about whether the husband actually made an assalut-like move against her. But, she should definitely have not returned into the house but run to someone else's home if she was certain-be-in-danger-of-life.

[Valpal1]

In a 2010 deposition, Gray admitted to abusing Alexander and multiple other partners: "I got five baby mamas and I put my hand on every last one of them except one." He added, "the way I was with women, they was like they had to walk on eggshells around me. You know, they never knew what I was thinking... or what I might do... hit them, push them."

http://www.buzzfeed.com/annanorth/the-9-events-that-led-to-marissa-alexanders-reve