well it can't be a crossbreed if your friend doesn't have any other neocaridinia shrimp in that tank. Albino sounds like the best bet. Anytime you have a species strain that has been heavily inbred to reinforce just one characteristic, red color in this case, you have a higher likelihood of genetic failures. Most of them are not visible, relating to inadequacies of internal organs or metabolic processes. This one just happened to be conspicuously visible.
Of course if you/your friend got several of these albinos and they were healthy enough to live to breeding age and breed true you would have another new strain on your hands and probably become semi-wealthy. of course those would be even MORE genetically fragile coming from an even smaller gene pool with less diversity, but such is the result of inbreeding.