Hello Birenbi,
Further to what Harsh mentioned about the Police & Medical Reports, please get the details of the accident from the employee. Did he/she have any fractures or any other physical conditions that justify the paid holidays? You can then request the X-Ray/CT Scan reports to verify the information in the Medical Reports (cross-check with your company's doctor). Relying solely on those reports may not be advisable since Medical Reports can be 'arranged' throughout the country.
A few months ago, we required photos to be sent in a case where an individual claimed to have had an accident, suffered a hand fracture, and was on plaster/sling, in addition to providing Medical Reports and X-Rays.
Regards,
TS