"He stabbed both of them with what's described as a kitchen knife, but it was able to cause injuries to them."
Shane's step-mother, 61-year-old LaDonna Alexander, was stabbed once in the chest and his father, 64-year-old Jerry Alexander, was stabbed in the back and arm. Chadwick says LaDonna was able to drive herself to the hospital.
"Jerry locked Shane out of their bedroom and was able to call 9-1-1."
Jerry was later transported to a local hospital with non-life threatening injuries. Authorities have yet to release a motive for the crime. Chadwick says, when authorities responded to the call, Shane was still at the house.
"He was taken into custody. He's currently charged with two counts of first degree murder."