LOUISVILLE, Ky. -- A cold case from 2007 came to a surprising end Monday.
The death of 84-year-old Marcelline Vale went unsolved for almost seven years until Monday, when her alleged killer confessed to the story.
David Satterfield, 34, is now charged with Vale's murder.
Police say Satterfield turned himself in Monday after asking police for a ride to the homicide office. He told police he was a certified medical technician working rounds at Parkway Medical Center the night of July 4, 2007, when he said he injected Vale with a large amount of insulin, knowing she wasn't a diabetic. Vale died four days later of an insulin overdose.
WHAS11 asked detectives why Satterfield decided to come clean after almost seven years.
"He had nowhere else to go. He was broke, no place to live and he had a terminal illness. He decided he wanted to come clean and clear his conscience," Sgt. Donny Burbrink, with LMPD said.
Police say Satterfield had been a person of interest in this case since the beginning and had previously questioned him a few years ago. They're continuing to investigate the jobs he held throughout the last few years.
It's unknown if he continued to work at area nursing homes or if there are other victims.
Parkway Medical Center released the following statement:
We are pleased that a person has been arrested in the connection of the tragic death of Mrs. Vale back in 2007. Our hope is this will give some closure to Mrs. Vale's family and the facility. Parkway fully reported and cooperated with authorities at the time of the incident. Authorities found no wrong doing by the facility.