Start with the basics and go on from there.
Is there power on the control board?
Is the light in the compartment working?
Is the compressor turning on?
Here's some info that may help. According to this parts list for the freezer, the wiring diagram is part # 27006006822.
It's pretty basic but at least it shows the connections on the control board to the various components.
If the freezer fails to start you may have to test all the components connected to the control board to make sure that they are "connected" to the control board, just in case if one isn't this indicates to the control board not to start the compressor
With the power disconnected to the refrigerator, using an Ohmmeter you can check all the components for wiring continuity back to the control board e.g. disconnect the wire harness plug on the control board connector CN5 and then connect the Ohmmeter between the two wires connected to the #3 and #4 pins in the cable plug, if OK it should show the sensor, between pins 5 and 7 the fan motor etc.
"Crimped wire" seems a bit strange unless it is in an inaccessible location.
Hopefully a start
The kinked white wire may only be to show which wire is the problem.
What is the cable plug connector designation and pin number on the board that the white wire goes to, is it CN5 pin 5?
If so you will have to prove the continuity of the white wire end to end to ensure that this assumption is correct, i.e. board to the evaporator fan motor. see p.4 of parts list linked above for evap fan motor (part #8C) location inside the freezer compartment
If it is broken somewhere in between it may be difficult to replace as it may go through another plug/connector or maybe not. It will also be buried in foam insulation which doesn't help.
If it doesn't go through another connector, then perhaps you can't even use the existing white wire as a draw wire to pull a new one through as it may be broken and it may also be taped to the other wire going to the fan motor from CN5 pin 7 and not run loose.
You could maybe pull 2 new wires through using the existing two fan motor wires as draw wires but this is only if they don't go through another harness plug connector in between and are just run directly between the two points.
Pulling on both wires at one end you may get an idea if you see them move at the other end. i.e. either the fan end or the board end. If only the two wires move and not the whole lot (at the board end) it may mean that they're direct.
Just ideas on what I'd check first