The National Institute of Technology in Kozhikode on Wednesday said Jolly Joseph, who was arrested in connection the death of her husband following consumption of cyanide-laced food, was neither a temporary or permanent employee of the institution.
"We have checked NIT records since the year 2000 and Jolly was not an employee at the institute. She was not even employed as temporary employee," NIT Registrar, Lt Col (Retd) Pankajakshan said.
The investigating officers had made a confidential visit to the campus a month ago to gather details of Jolly, who had claimed for years that she was a lecturer at the institute.
Jolly, a commerce graduate, had told her relatives and friends that she was working in the NIT and used to travel by car to the college daily.
Eight years after her first husband Roy Thomas's death following consumption of cyanide-laced food, police had arrested Jolly and two others on Saturday and started investigations into the death of five others of the family between 2002-16.
The investigation into the suspicious deaths in Roy's family began after his U.S based younger brother approached police complaining that the post-mortem report had revealed traces of cyanide.