ANCHORAGE, Alaska - The mother of the man who fathered former Alaska Gov. Sarah Palin's grandson is serving out most of her three-year drug sentence under home confinement.
Sherry Johnston was released Monday from Alaska's only women's prison. Her attorney, Rex Butler, says Johnston is wearing an ankle-monitoring device.
Johnston was sentenced last month on her guilty plea in August to one count of possession with intent to deliver the painkiller OxyContin.
The 43-year-old Johnston is the mother of Levi Johnston.
He and 18-year-old Bristol Palin the eldest daughter of the 2008 Republican vice presidential candidate were engaged but called off the wedding after their son, Tripp, was born late last year.