Ziegert's mother thanked investigators Monday for their determination in solving the case.
Ziegert, an aide at Agawam Middle School, was working the night shift alone at the store when she disappeared April 15, 1992. Her body was found in a wooded area 4 miles away four days later. He was released from the medical facility Monday and is now in the custody of the Connecticut State Police on a fugitive from justice charge as he awaits extradition to MA.
Investigators began to look back at persons of interest whose DNA was not on file, he said.
Gary Schara, 48, of West Springfield is facing charges of murder, kidnapping and aggravated rape in relation to the death of Lisa Ziegert.
Upon arriving in the morning the clerk found the store open, the lights on, and the victim's vehicle parked where it was the night before. Her purse, her other personal belongings and the store's cash register appeared undisturbed.
"There's a significant amount of resources the DA provided to the case that. led to this new development", Leydon said, adding that Gulluni has been in touch with Ziegert's family.
Massachusetts State Police tried to notify him about the process last Wednesday, but he was not home.
The District Attorney said in the news conference that Schara has confessed to the murder. But the next day, a person close to Schara contacted investigators and provided them with handwritten documents, purportedly written by Schara, in which Schara allegedly admitted to abducting, raping and murdering Ziegert.
Schara was located in CT the next day after a suicide attempt, and arrested when his DNA was found to be a match.