A jury found that Amanda Hayes helped dump Laura Ackerson's dismembered body into a Texas creek. She's been sentenced to 20 years.
The bodies of at least 100 prisoners and visitors have been discovered.
Officers suspect murder suicide after man's corpse also found at Austria's Lake Traunsee.
Investigators say the suspect is a 49-year-old teacher from Ongwediva, a town in the Oshana Region. Authorities have not