Rep. Frederica Wilson, D-Fla., thanked Rev. Al Sharpton for helping her community "heal" after he spoke at prayer service Friday with the family of Sgt. La David Johnson, one of four U.S. soldiers killed during an ambush in Niger last month.

Sharpton, who is the president of National Action Network, delivered the keynote address and touched on the infamous phone call between Johnson's widow, Myeshia Johnson, and President Trump, which Wilson listened in on and described Trump as being insensitive β€” a claim backed up by Myeshia Johnson but disputed by the White House.

"To act like she did something wrong, to stand up for a soldier killed in the line of duty ... I can't understand how we can even rationalize that," Sharpton told the congregation gathered at a church in Miami. He also spoke about the threats Wilson has received ever since her public feud with Trump began.

"Did you think that you could come after Frederica Wilson and we wouldn't stand there and say, 'we will give in,'" he said to cheers.

Wilson tweeted her thanks to Sharpton for "helping our community heal" and also said it was "wonderful" to have the family of Sgt. La David Johnson in attendance.

A statement from Wilson's office described her as a "voice for the voiceless."

β€œIn an effort towards healing and unifying our community during these times of pain and conflict, faith leaders will join together at a prayer service to cover Congresswoman Frederica S. Wilson (FL-24) in prayer as she continues to be a voice for the voiceless,” the statement, reported by CBS Miami, said of the event, which occurred on Veterans Day.

Separately, Wilson issued a statement questioning the mysterious circumstances of Johnson's death.

"On Tuesday, November 7, I received a classified briefing on the attack in Niger during which Sgt. La David Johnson and three others of his unit were ambushed and killed. I am not at liberty to discuss the details of what I was told, but I did ask several questions about the incident," Wilson said in a statement sheared by WSVN, a local Fox affiliate. "I was told that the government's investigation is ongoing, so I was surprised to wake up and read so many of the horrific details in the Washington Post, the Miami Herald, and other leading publications. I am very concerned about the mysterious circumstances surrounding Sgt. Johnson's death and I need and want answers now."

Her statement follows a Washington Post report which said Johnson may have been captured and then brutally executed. Another report said Nigerien military sources believe fighters linked to the Islamic State decided to capture and kidnap Johnson.

The Pentagon has not disclosed how Sgt. La David Johnson, who was found two days later about a half mile away from the ambush, was separated from other soldiers.

The U.S. Army announced that it has notified the family members of the four U.S. soldier killed that the investigation of the incident will likely conclude in January 2018.