The Bystander Effect.

Heads up; This is mainly exploring thoughts and possibillities under no circumstances would I ever endorse someone doing this.

You could also take the injury sue, agree to pay for everything and more, befriend the family by apologizing deeply, agree to take care of him/her and then after 2-4 months when the dust has settled feed him/her some cardiac glycosides found in e.g. Oleander. Act shocked as the person got a heart attack out of nowhere and you're good to go.

That way you don't go to prision for homocide, pay a lot of money to the family in damages and you don't have to care of some cripple for the rest of his/her life.

If you really don't want to get caught, you could extend your timeframe by another 4-5 months and start to slowly feed the person stimulants e.g. the constantly new amphetamines like Dexamphetamine or Lisdexamohetamine so that his heart will show scars and damages so the coroners don't think of poison right off the bat. You may also want to feed the person some Alprazolam and Bupropion so he's too busy tripping balls on anti-depressants to complain about tightend chest or irregular heartbeat to his doctor.

Do 2-3 weeks of detox and somehow make the person shave his head, (to hide traces of all these drugs) before poisoning him/he. Doing all that you still have to hope you won't get an experienced coroner and that the family doesn't give enough of a shit about their relative to check up on them.

So in essence; make sure to run someone over in China as a Chinese or you're boned.

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