@Jean Pierre It is a big deal when you are a landlord who is liable to inform tenant of the death making it hard to fill the occupancy, and frankly, I wouldn't want to live in a place where someone died. I bought this property as an investment turning into my future retirement. Now I don't know if I want to live there.
Updating... So I went to the county recorder's office, obtained the death certificate, and found out that in deed the tenant died in the unit in February 2015, 11 months prior to COE. I am so convinced that the seller and the agent intentionally concealed it. I had an attorney prepare a letter to this agent, and his insurance claim adjuster sent me a response saying that he is denying the allegation and claiming he did disclose (lie. I got no paper work) and the tenant did inform me during inspection (another lie). I am bringing this to a mediation. This is my first time to take such an legal action.
As always your input is highly appreciated.