Investigation against previous Director by CBI
The Central Bureau of Investigation (CBI) under a new chief will, on the basis of a Supreme Court order, investigate and, probably prosecute, its former director for prima facie abusing his authority while in office.

SC asked CBI chief Alok Verma to form a Special Investigation Team (SIT), which he will personally head, to probe the role played by former CBI director Ranjit Sinha to “scuttle enquiries, investigations and prosecutions being carried out by the CBI in coal block allocation and other important cases.”

Reason for the probe: Logbook entries
The order came on the basis of revelations made by NGO Common Cause. It had accessed the visitors’ log maintained at Mr. Sinha’s official residence when he headed the agency.
The log showed frequent and unofficial meetings held by Mr. Sinha at home with the accused in the multi-crore coal scam cases in the absence of investigating officers.
CBI Director is the senior most position in the CBI.

SIT probe
The court had earlier appointed a former CBI special director, to go through the entries in the log and conduct enquiries into other relevant documents to verify the allegations. He reported back in March 2016 that an enquiry by a SIT was necessary.