I found a dead body the other day
What the heck do you mean you from a dead body? What are you going to do with the body?
I'm not sure what to do or where to dispose it.
Are you feeling alright? It must have been a very traumatic experience finding the dead body. You need to call the authority and have them dispose of the body, not you.
I'm trying to get rid of bugs at my house when I found the dead body in the garden.
I understand and know that this was not your fault.   Let the authorities know and be honest with how you found it and you will be helped.