The co-sponsor of the NRA’s upcoming leadership forum routinely attacks African-American youths killed in controversial shootings, and he has more than once smeared the mothers of two deceased Florida teenagers as liars motivated by money in their opposition to Stand Your Ground laws.

On May 20, Donald Trump and other Republican politicians will speak at the National Rifle Association's annual Institute for Legislative Action leadership forum. The event is being held at the NRA’s annual meeting in Louisville, KY, which runs from May 19-22.

According to the NRA’s website, the forum will be co-sponsored by Bearing Arms and Townhall Media. Bearing Arms is a well-known gun blog run by Bob Owens.

Owens frequently makes inflammatory claims. In October 2015, he authored a post on his blog suggesting that “radical” Democrats will be hanged after they start a civil war against Republicans over issues including gun ownership. Owens illustrated his post with an image of gallows. In 2010, when Media Matters documented another instance in which Owens fantasized about a second civil war in the U.S., Owens responded by writing that he hopes the “propagandists” at Media Matters “feel threatened.”

Owens has weighed in on the shooting deaths of African-American youths Trayvon Martin, Jordan Davis, and Tamir Rice, in each instance also attacking a member or members of the deceased’s family.

In a recent post on his website, Owens called Martin “a semi-literate violent criminal,” among other insults. Owens has also claimed that Martin’s mother opposes controversial Stand Your Ground self-defense laws because she wishes to enrich herself through a lawsuit.

Owens has also attacked the mother of Jordan Davis, a Florida teenager who was killed in a gas station parking lot by a man angry about the volume of Davis’ music. Owens called Davis’ mother, Lucy McBath, a “serial liar” for accurately noting that Stand Your Ground played a role in the George Zimmerman trial.

Owens has also attacked Tamir Rice, blaming both the 12-year-old and his parents for Rice’s death.

Trayvon Martin

Owens frequently directs invective toward deceased Florida teenager Trayvon Martin. In February 2012, Martin, then 17, was fatally shot by neighborhood watch volunteer George Zimmerman. A confrontation between Martin and Zimmerman occurred after Zimmerman began to follow Martin as the high school student walked from a convenience store to his father’s house.

While Zimmerman has a well-documented history of violence -- both before and after the Martin shooting, including an assault on a police officer and multiple domestic violence allegations -- Owens routinely attacks Martin’s character.

In a May 11 blog post, Owens called Martin “a violent, drug-abusing thug who appeared to get off on hurting people” and “a semi-literate violent criminal,” and he slammed an upcoming musical about Martin’s life, which he claimed would be “whitewashing a black heart” and which he called an attempt to “whitewash a thug’s death.”

In a 2014 post, Owens argued that “good people … will arm themselves against violent young predators like Trayvon Martin” because “any society that hopes to survive simply has no choice.”

Owens has also attacked Martin’s mother, Sybrina Fulton. In a 2013 post, he claimed that Fulton had raised a “monster” and that her advocacy against Stand Your Ground laws, like the one cited by a juror in explaining Zimmerman’s acquittal, was really about personal enrichment.

Owens wrote:

As for why Fulton and her attorneys and Democratic lawmakers in general want Stand Your Ground laws repealed, that’s blisteringly obvious as well. Money. A provision of Stand Your Ground law in many states is that if a person is found not guilty during a criminal trial, then that defendant win (sic) civil immunity, and that keeps the families of deceased street thugs from suing the survivors for millions of dollars in civil court.

Jordan Davis

Owens called the mother of slain Florida teenager Jordan Davis a “serial liar” over her advocacy against Stand Your Ground laws following Davis’ killing. In fact, Owens is the one lying about Stand Your Ground.

In November 2012, Davis, 17, was murdered by Michael Dunn in a Jacksonville, FL, gas station parking lot. Dunn had told Davis and his friends to turn down their music before he fired 10 rounds into the car Davis was sitting in.

In February 2014, Dunn was found guilty on four charges, including three for attempted second-degree murder on the other teens in the car, but the jury could not come to a decision on the first-degree murder charge tied to Davis' death. During closing arguments, Dunn’s attorney cited Stand Your Ground in arguing against a murder conviction for Davis’ death. A mistrial was declared on the murder charge, and Dunn was subsequently convicted of first-degree murder during a second trial that concluded in October 2014.

Following Davis’ killing, his mother, Lucy McBath, has become an outspoken advocate against Stand Your Ground laws. Owens attacked McBath for this advocacy in a May 13 post, claiming, “She has become radicalized, and now travels the nation attempting to strip law-abiding citizens of their most basic natural right as a human being, the right [to] bear arms for self defense.”

According to Owens, “McBath has become a serial liar, and sadly seems to be more comfortable with her lies as time goes on,” because she wrote an opinion piece that said Stand Your Ground played a role in the Zimmerman trial.

While Owens claimed McBath is a liar because “Stand Your Ground laws had nothing at all do do (sic) with the [Zimmerman] case,” he is wrong.

The language of Stand Your Ground was included in instructions to the jury considering whether to convict Zimmerman of second-degree murder. Prior to the law’s enactment in 2005, the instructions given to the jury were much different. As explained by a former Florida state senator, the change in the letter of the law “fundamentally changed the analysis used by juries to assign blame in these cases.” Following Zimmerman’s acquittal, a juror told CNN that Zimmerman was found not guilty “because of the heat of the moment and the Stand Your Ground.” Zimmerman also benefited from Stand Your Ground pre-trial, as local government officials cited the law as the reason Zimmerman was not initially arrested.

Owens also called McBath a liar because she wrote that Stand Your Ground laws “promote a culture of shoot first, ask questions later, a culture that upends traditional self-defense law and emboldens individuals to settle conflicts by reaching for their firearms, even when they can safely walk away from danger.” But McBath is correct; academic research has established that Stand Your Ground laws increase homicide by “lower[ing] the cost of using lethal force.”

Tamir Rice

Owens frequently defends the widely criticized police shooting of 12-year-old Tamir Rice. In November 2014, Rice was shot in a public park in Cleveland, OH, after a 911 caller reported seeing Rice waving around an Airsoft replica pistol. Police shot Rice within two seconds of coming onto the scene, apparently mistaking the toy gun for a real firearm (the 911 caller’s repeated suggestion that the gun was “probably fake” was not relayed to the responding officers).

After the city of Cleveland agreed to a monetary settlement with Rice’s family, the local police union caused controversy by arguing that some of the money should be used “to help educate the youth of Cleveland in the dangers associated with the mishandling of both real and facsimile firearms.”

Owens weighed in on the controversy, attacking the deceased 12-year-old and his family. Of Rice, Owens wrote that “it is entirely fair to ‘blame the victim’ when it was the specific actions of the victim that led to his demise” and that “Tamir Rice died because he made poor choices.”

He also suggested that Rice’s family was responsible for his death, claiming that the Rice family’s outrage over the police union suggestion means “perhaps the Rice family doesn’t care any more about being responsible after Tamir’s death than they did about teaching him to be responsible with realistic toy guns while he was alive.”