This is just a not-so friendly reminder to non-disabled people, especially authors, people in fandoms or in media analysis circles: Cripple/crippled is not just a fancy way of faying "badly injured". it's not an adjective you can just throw in to spice up your sentence because you used "injured" or "disabled" too many times in that paragraph, or because you feel like it gives your writing some extra "oomph".
A slur the physically disabled community has been asking people not to use for DECADES, since at least the 1970's (50 years). It's a slur with centuries of abuse behind it, centuries of being used to justify physically disabled people as less-than, centuries of demonisation, mistreatment, ostracization, and murder.
Some people within the physical disability community are reclaiming it, that's where movements like cripplepunk (also known as crip-punk or C-punk) come from. That's fine, I'm not talking about that. I love the cripplepunk movement and everything it stands for: being unapologetic about our disabilities and not changing ourselves for the comfort or convenience of able-bodied folks. But the people who use it in that context understand the history of the word, they know how it was used to hurt us, and they understand that not everyone in the physically disabled community is comfortable with the use of the word, especially those who were around when someone being labelled as "crippled" was seen as a valid reason to treat them as less than human. They understand the impact of the word.
But If you, as an able bodied person, casually uses "cripple" in your work, at best you are showing your disabled audience that you haven't been listening to us, at worst, you show you don't care about weather we feel safe in the spaces you have created.
And for able-bodied authors specifically, even if your character is physically disabled, I'd still recommend avoiding it unless you're prepared to do a LOT of sensitivity readings from multiple sensitivity readers. I've been physically disabled since I was 1 year old, I learned to walk for the first time in prosthetics and have been using a wheelchair since I was in school, I have no memory of life as an able-bodied person, and even I don't feel comfortable using the word cripple in my work.
It's a loaded word, with a lot of implications and a LOT of very dark, and for some people, very recent history. It's not a sentence enhancer to just throw in willy-nilly. Please.