I'm going to my aunts house to do some fishing this weekend. but this winter they had a fish kill if there are still fish in there were will they be? and what are some good lures to use?

Well being in illinois i would say you are fishing post spawn 100%. therefore you will find male bass in shores still esp in weedbeds. If you looking for post spawn females fish deeper with soft plastics or cranks baits. on on the flats past the weedbeds nearing a dropoff.

Why did they kill the fish?

Well being in illinois i would say you are fishing post spawn 100%. therefore you will find male bass in shores still esp in weedbeds. If you looking for post spawn females fish deeper with soft plastics or cranks baits. on on the flats past the weedbeds nearing a dropoff.

My first thought was to respond that "The fish are somewhere in the water" but we're all above that kind of stuff.

Agree with post spawn from JJ08 but don't assume all females are deep and all males are shallow. Use that as a general rule of thumb. Being from your neck of the woods I catch big females all throughout the post spawn and summer in water from 2-4 feet deep. (around and under docks etc.)

Main forage for these fish are bluegills which tend to stay shallow or suspend lest they get eaten by even bigger fish such as pike and muskies. Don'T assume because the water is shallow and warm the bass won't be there. Cover is the key.

I have to disagree a little bit. Recent visual sightings have confirmed that LM are still on their beds in several lakes in my neck of the woods. In western MA, which is on par with, or more southerly than northern IL, I have to believe you will find some bass on beds there as well. Of course our spring has been rather slow this year with temps rising very gradually overall. Not sure what your water temps are?