Doreen Dunn had lived in pain for a decade by the time she killed herself in May 2007.
After consulting with the nonprofit Final Exit Network, she used helium and a plastic bag to end her life on the couch of her Apple Valley home.
Now, an investigation of the 57-year-old's death puts Minnesota at the center of a national debate over assisted suicide.
Dakota County Attorney James Backstrom will present evidence to a grand jury this week seeking indictments against the Georgia-based Final Exit Network and a handful of its members, accusing them of breaking state laws against aiding a suicide and interfering with a body.
It's the third time in recent years that prosecutors around the nation have gone after the group, which mostly fought off high-profile criminal charges in Arizona and Georgia.
The network insists that its volunteers are within the law because they don't provide equipment or physically participate in suicides, only offering information and support, sometimes by being present during the suicide.
"We do give explanations of how to do it," said Robert Rivas, a Florida attorney for the Final Exit Network. "We don't advise anybody to do it."
Backstrom confirmed the investigation and his intentions to bring the case before a grand jury but declined to comment beyond a written statement.