Parker apologized Thursday in a statement issued through Everytown for Gun Safety, the gun-control advocacy group he was worked with to produce television ads in several key Virginia Senate races.
"In my grief over the murder of my daughter and my anger over a political system that allows incidents like that to continue, I spoke regrettably," Parker said. "I apologize for my words, but make no mistake, I will continue to seek justice and change as a father in memory of my daughter."
Stanley said he discovered the second comment Wednesday night after hearing that Parker said the "worst nightmare" message was not intended as a physical threat. Stanley said someone attempted to erase the second comment, which no longer appears on Stanley's public page. Stanley shared a screen capture of the post with the Richmond Times-Dispatch.
During the radio show, McAuliffe was asked to weigh in on the dust-up before the second comment became publicly known.
Stanley called the governor's "man up" comment "appalling and quite stunning."
"He needs to be helping the healing, not agitating the situation with such flippant comments," Stanley said.
Stanley said McAuliffe and his allies are using Parker, who lives in Henry County, as a "pawn" in the push for gun control.
"I think they should have been a little more careful in the selection of their spokesman and should have been a little more mindful of the emotions that Mr. Parker is going through during a grieving process for a horrible tragedy that occurred to him," Stanley said.