Allegation of changing statement by employee

I work in a BPO as a Manager : 1.I gave a written statement for one of my direct reportees for entering the office premises under the influence of alcohol as reported by the office security staff.As his shift had ended I let the employee go home. 2.The following day as employee stated that he was not under the influence of alcohol but due to medical reasons I marked a mail to HR that though last night I had given a statement for employee being under alcohol his point regarding a medical issue should also be considered. I also reminded that no alcohol test was conducted and employee had some medical issues in the 10-15 days preceding the incident. 3.15 days post that employee had actually to be taken to a nursing home for urgent medical care while he was on his way to office.Attending doctor recommended hospitalization for medical observation. I still go with my first statement HR is stating that I am changing my statements.What are my supporting legal points (Acts,etc)