The woman who struck and killed a newly widowed mother of twins at a Maple Grove intersection in January will undergo a hearing this summer to determine whether she is mentally fit for trial.

A competency hearing for Linda L. Hamm is set for June 28, said her attorney, Frederick Goetz. Hennepin District Judge Peter Cahill will make a ruling sometime after that.

Hamm, 61, of Maple Grove, is charged with criminal vehicular homicide in the death of Ann L. Blake, 54, who was with her sister on a curb at a Maple Grove intersection Jan. 31 when she was struck from behind. Hamm's blood-alcohol level was more than twice the legal limit and an open vodka bottle was found in her vehicle.

Goetz said Hamm has dementia and significant cognitive disorders from a "long downhill slide" related to a series of aneurysms. She does not remember the crash, he said, adding that she does not dispute the charges against her.

According to charges, Blake's sister told police that the two were waiting for the "walk" signal in order to cross Hemlock Lane when Hamm's sport-utility vehicle hit Blake, according to the complaint.

Hamm continued east and crossed all lanes of southbound traffic on Hemlock before crossing the median and striking a northbound vehicle that was waiting for the light to change, pushing it into another vehicle, police said. An officer called to the area on a report of a motorist speeding and driving erratically saw it all play out. The officer found that Hamm "had watery, glassy eyes and was confused," according to the complaint.

Blake's husband, Dan, died late last year after a 10-month battle with cancer. Family members are taking care of the couple's two children.