Mass Killing

Pardon me while I wipe away the tears....When I got home after work today I saw that my Koi was up side down in the pond. Upon closer inspection I noticed that all of my small minnows were dead as well. What could have caused this I wondered? Did someone poison my fish? Who would have done such a thing? Then I saw the cause of death......ELECTROCUTION!!!! The hot wire that runs arround the pond broke and the end was in the pond. I have had that Koi for 3 years. He was 13 inches long and was just starting to come over to the edge for hand feeding. I will winter the pond and start fresh this spring with new plants and fish. Maybe I will try a different type of fence to keep out the wildlife.