I'll post what it says since you didn't;
It is not at all uncommon for death penalty opponents to make false claims about innocents executed. As of 1/1/03, The National Coalition to Abolish the Death Penalty (NCADP) claims that "Twenty three (23) innocent people have been mistakenly executed (in the US) this (the 20th) century." (32) This is a common false claim, even though the authors of that 1987 study, in response to a deconstruction of their work, stated, in 1988, that "We agree with our critics that we have not proved these (23) executed defendants to be innocent; we never claimed that we had." (33). The NCADP is well aware of this, yet it doesn't stop their deception.
RG, Please tell me that that's not what you were referring to.
The article clearly states that there is no proof whatsoever that an innocent has been executed in modern history i.e., post 1900.
And we're clearly discussing modern history where with the burden of proof now incorporating DNA testing, not executing innocents should stay that way.