"Lethal injection" is a method used to cause someone's death by injecting them with a deadly substance, usually in the form of a liquid, to end their life. Full definition
They challenged the execution by lethal injection on the grounds that it was unconstitutional as a method by which a capital sentence should be carried out. (newlawjournal.co.uk)
Sadly, that plight ended today with one dose of lethal injection on a dog who did absolutely nothing wrong. (mabbr.org)
The county currently uses lethal injection about 65 % of the time compared to 71 % statewide. (animallawcoalition.com)