A Texas man charged with killing his 77-year-old grandmother and dismembering her body with a chain saw has pleaded guilty to murder.
A judge sentenced David Christy to 20 years in prison Tuesday as part of a plea deal. The remains of Johanna Kruse Christy were found buried in shallow graves behind her home where she lived with her grandson in February 2013.
Authorities said Christy hit her in the head with a blunt object and used the saw to help dispose of the body. He previously told police she wasn't his grandmother and that she tried to poison him.
A judge ruled Christy competent to stand trial in May.
Copyright AP - Associated Press
