Hey there, @DyanaK
I am sorry to hear that you find yourself in a situation that you require that footage, I hope you and your close ones are okay! I would love to look into this further for you. However, I do have to unfortunately tell you that unless you have a Nest Aware subscription, you only get to view footage for 3 hours before it goes away. Here is a great link on how Nest Aware works and how to subscribe, and here is a link on how to manage your subscription.
Please let me know if you need further assistance.