Where did these come from!!!

Alright who has been putting monster fish in our lake? We have owned property in Memphis, IN since 98 now and I have fished it every year on numerous occasions... We have stocked it with minnows every couple years and about 4 years ago we had a little black parasite that took over the fish and killed most of everything in the water to our knowledge... We had a fish with the black spots all over it tested by a biology professor from the University of Purdue which my uncle had known and he couldn't tell us what it was... The past 3 years have been terrible out there and the biggest that we have pulled out is probably just 4lbs... And now out of no where this past month have brought huge fish and I was just wanting to know if anyone would have any reasoning for this? The pictures are from my cell phone so they aren't the greatest and just for reference I am 6-0 and 225 and my brother is 6-3 230... I don't know if the effect of the parasites on the lake wiped out most of the fish and it might have been over populated or what but there is for sure a good thing that is happening? Any thoughts? I will post pictures on the photo board...

I'm not for sure. PM me directions and after I fish it a few times then I can probably offer some sort of explanation :)

I like pastorbass will need directions to the lake to further exces this problem, will probaly take a couple of weeks, and at least 10 fishing trips to make an educated guess.

Can I hitch a ride on the bumper? I'm curious, too. Have suspisions about what is going on. I've seen little worms under the scales but nothing like that.