As resident hyperlocal cryonics sort-of-expert-I-guess, I do not recommend this; see mukashi’s answer. Relatedly: The legal hurdle is that it’s considered murder.
Further to it being legally considered murder, tricky plans to get around this are things that appear to the state like possibly a tricky plan to get around murder, and result in an autopsy which at best and only if the cryonics organisation cooperates leaves one sitting around warm for over a day with no chance of cryoprotectant perfusion later.
As resident hyperlocal cryonics sort-of-expert-I-guess, I do not recommend this; see mukashi’s answer. Relatedly: The legal hurdle is that it’s considered murder.
Further to it being legally considered murder, tricky plans to get around this are things that appear to the state like possibly a tricky plan to get around murder, and result in an autopsy which at best and only if the cryonics organisation cooperates leaves one sitting around warm for over a day with no chance of cryoprotectant perfusion later.