Leaking in freezer don't know where water comes from

1. Your freezer may be not cold enough so water does not freeze.
2. Your freezer may leak so warm air goes into the freezer and keep the temperature higher than freezing temperature.

the defrost drain pan is plugged up,you need to defrost it and run a wire down the drain tray hole so it can drain to the bottom as it defrosts otherwise it defrosts and runs everywhere else and re freezes

Your freezer goes to a defrosting cycle and actualy melts away some ice formation inside the freezer, normaly this melted ice (water) drains trough a tube in the back of the frig... the drain is probably clogged and the water spils out... to unclogg it you need to find the uper end of the drain (where the water drips in) usualy way in the back of the frigidaire, than try pushing a long wire in downwards to unclogg the drain, also check underneath or in the back of the frig. ther should be a back to hold the water for the time it evaporates, see if it is not full of water or dirt (dust) i even foud some pet toys in there once ha! ha!

Hope this helped!

I see you said you looked and the water valve is off but the only that I know of this happening is a defective water control valve. Like a dripping faucet that when off slowly drips until the ice forms and then one the ice maker dumps ice and tries to refill the water goes in every direction. Unplug water valve to confirm what I am saying, Tell me if it continues to leak. Sea Breeze

Here is a link to different ways leak happen. Choose the part that applies most to your situation and let me know. I will be here to advise and assist you, Thanks and please rate these solutions. Click on link below, Thank You Sea Breeze

HOW TO FIX A DRAIN LEAK INSIDE REFRIGERATOR AND FREEZER PART 2

The drain is clogged and needs to be snaked out.

hi August.
Cause: A blocked defrost drain is one of the most common causes of water leakage. This happens when food particles or other debris clogs up the drain hose, which can lead to ice buildup and, eventually, water leaking out of the freezer and refrigerator.
3 common refrigerator problems you can easily fix yourself

The freezer drain hose will drain the defrost water into a drip pan at the bottom of the freezer. When this pan becomes full, it will leak water onto the floor. This is a regular maintenance task whenever the freezer defrosts. Empty the drip pan during the defrost cycle.
How to Fix Water Leaking From the Bottom of Freezer

Why is my fridge leaking water on the floor? If the refrigerator is leaking water it's possible that the refrigerator has a clogged or freezing defrost drain. If the defrost drain freezes the defrost water will overflow the drain and drip down to the bottom of the compartment, If enough water accumulates in the bottom it can run out onto the floor.
SOLVED Water leak in refrigerator Refrigerator

tata75,
Happy to assist you,

you said,
For the past three days, water has been leaking/freezing at an alarming rate. The freezer had about 2 inches of ice built up and the bottom of the refrigerator is holding water, too. Both crisper s were FULL of water. I don't know if the ice maker connection is broken or what. Looks like I have to cut off the cold water completely to the sink to get it to stop.

Sounds like the ice maker or its line is leaking the water to me. And obviously it will freeze in the freezer.

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more than likely you have a frozen defrost drain look in the bottom of your freezer section there should be a depression there see if its just a big block of ice let me know if this is the case or not and ill tell you how to clear the drain if not then we will look at something else please dont rate me till were done

your drain will be plugged under the tray. there is a hose that runs to the drip tray. the back cover comes off you can then get at the hose