A team of Thumba Police arrested the fugitive on Thursday morning.
The deceased was identified as Shishir.
Ajumon told the Kerala Police that many people who had approached him for jobs abroad were aware that they would not receive permanent employment with the documents in their possession.
Shajahan was arrested by a special team of Palakkad Town South Police from Tamil Nadu.
Sadiq had stolen Rs 50,000 from his former employer at Kottooli in Kozhikode on Thursday.
Shruthi was found dead under mysterious circumstances in the bathroom at her husband’s house on January 6, 2020, the 14th day after her wedding.
It is understood that Ambika left a suicide note, in which she took the blame on herself.
Police said they recovered the partially decomposed body of the woman on Tuesday night and sent it for post-mortem. The boy was apprehended.
The Pariyangad-native had stolen Rs 50,000 from his father's savings.
The accused, Jayan, told the police he wanted to avenge the killing of his wife, for which the deceased's son is jailed.