Former Star TV CEO Peter Mukherjee's wife Indrani Mukherjee's first husband Sanjeev Khanna on Wednesday was arrested by Mumbai Police.
Khanna was arrested in Kolkata after interrogation.
Indrani, who was arrested yesterday, was taken to Thar jail by Mumbai Police and will stay in police custody till August 31.
She was charged of murdering her sister and disposing off her body.
Further details are awaited.