The 15-year-old tribal girl from Attappady in Palakkad district secured highest grades in the Kerala State Class 10 examination of which the results were out on Wednesday.
The 24-year-old was forced to live in the verandah of a house for a week with her child after her husband locked her out.
The police have filed a case against her 31-year-old husband Manu Krishnan, a native of Dhoni in Palakkad, under the Domestic Violence Act.
The CBI team is headed by SP B Ramanathan, and DySP T P Ananthakrishnan. The officers belong to the special crime branch, Thiruvananthapuram.
The body of the victim, Fakruddin alias Sajeer, hailing from Thiruvizhamkunnu, was found in a pool of blood at the shed of a remote plantain farm.
Case was filed under the POCSO Act after the girl's mother complained to the Chief Minister, DGP and the State Women’s Commission.
Mukesh, the two-time CPM legislator, had said children were being made to phone him with a political motive.
Comments on the hawala money row, Manjeswaram and Bathery election fund deal allegations and cases were completely avoided.
The cut has been implemented reportedly considering the increase in paddy cultivation and yield over the years.
The deceased is Fathima Shifa, 9, daughter of Ali.