According to the statement released by Lt. David Turno, of the Aiken Department of Public Safety, investigators-- working with the attorney of Larson Smith -- are now able to exclude him from any involvement in the death of his mother at this time.
"With his attorney Larson Smith has met with investigators on a number of occasions and answered all questions asked and participated fully with investigators. His cooperation helps investigators narrow their focus in the investigation by excluding him from involvement at this time," the statement said.
In the meantime, investigators are still working the case, hoping for a break that will lead them to the person responsible for the 47-year-old's death a year ago this month.
On April 25, Ms. Smith's body was found at her Whitney Drive home after she didn't show up for work at Kennedy Middle School, where she had been a special education teacher for 18 years.
Detectives don't believe the stabbing was random or committed by a stranger, police have said.
Early in the investigation, detectives were able to exclude Ms. Smith's daughter as a suspect. After her body was discovered, investigators also spoke with her estranged husband, Wilson Smith Jr., and two teenage sons.