The president of Worldwide Capital Lending Group is under scrutiny for his alleged role in funding the operation as the investigation continues.
Jimmy Cherizier, a former police officer and leader of the nine gang coalition "G9" spoke to an assembled crowd demanding justice for Moise's death.
Violence erupted at the assassinated president's funeral on Friday. The U.S. and United Nations delegations quickly left the scene.
"There was infiltration in the police," said Police Chief Léon Charles after the arrests of four more individuals on Tuesday.
Some 300-400 migrants, mostly coming from Haiti, were seen arriving at the gate with the hopes of entering the United States.
Speaking to the Post, Joseph said, "Everyone who knows me knows that I am not interested in this battle, or in any kind of power grab. The president was a friend to me. I am just interested in seeing justice for him."
In one neighborhood, residents tied suspects' arms with rope and forced them to walk while yelling "Move! Move!" until they could hand them over to police.
Officials say the proof was a photo they found in which men working for the firm were meeting with Colombian Americans suspected of being involved in the assassination.
A report from a Columbian-based private TV station claimed government officials were involved in the assassination of President Jovenel Moïse.
"It is extraordinarily dangerous," Mayorkas said. "It is not worth the risk."
The U.S. will qualify for the quarterfinals if it beats Martinique and Canada avoids defeat against Haiti.
"This villainous act is an affront to our democracy," the Haitian government's anti-corruption unit said.
The threats come one week after President Jovenel Moïse was killed in his home on July 7.
Security Secretary Alejandro Mayorkas says migrants intercepted at sea will not be permitted to enter U.S.
Authorities have detained 18 of the Colombians, in addition to three Haitians also suspected in the killing.
"Tears will never dry from my eyes. My heart will always continue bleeding. But we can't let the president die a second time," Haiti's first lady Martine Moïse said.
"Our assistance is to help the people of Haiti and to help them get through what is a very challenging time," the White House's press secretary said.
"We are going to bring them to justice," National Police Chief Léon Charles said, as the 17 handcuffed suspects sat on the floor.
Joseph Vincent, 55, and James Solages, 35, were reportedly detained following Wednesday's assassination of Haitian President Jovenel Moïse.
Six people have been arrested in connection to Haitian President Jovenel Moïse's assassination, including two people believed to be Haitian Americans.
Claude Joseph has been leading the country, but he was supposed to be replaced by Ariel Henry, whom Moïse named prime minister a day before his death.
Haiti's National Police say that officers remain "engaged in a battle" with additional armed suspects.
"If Haiti just quietly sunk into the Caribbean or just rose up 300 feet, it wouldn't matter a whole lot to our interests," then-Senator Biden said in 1994.
Arrangements have been made for her to be taken to Baptist hospital for treatment. Officials say her vitals are stable but critical.
"The situation is dire. We're praying for peace in Haiti," Pastor Dieufort Fleurissaint said after Haitian President Jovenel Moïse was shot and killed.
The international airport in Haiti was closed as the country declared a "state of siege" following Moise's assassination early Wednesday.
World leaders are reacting to the assassination of Jovenel Moïse, 53, during an attack on his private residence.
Interim Prime Minister Claude Joseph called it a "barbaric" act.
Haiti's PM is understood to have confirmed the death on a local radio station and appealed for calm in the country.
Unidentified attackers killed the 53-year-old president. First lady Martine Moïse was wounded and taken to hospital.