One former Haitian official called the arrest of Mario Palacios "a step in the right direction."
So far, more than 40 suspects have been detained in connection to Moïse's death, but police have not yet determined a motive.
According to Superintendent Stephanie Lindsay of the Jamaica Constabulary Force, local Jamaican officials are still in the process of making calls to different embassies and ministers of foreign affairs to confirm details regarding the latest suspect.
Between September 19 and October 3, the U.S. sent more than 7,000 Haitian migrants back to Haiti, according to the U.S. Department of Homeland Security.
Prime Minister Ariel Henry dismissed two government officials this week for seeking to interview him regarding President Jovenel Moïse's assassination.
"I wasn't supposed to be alive that night," she said of the July 7 assassination attempt that killed her husband. "So I'm still at risk."
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.
A report from a Columbian-based private TV station claimed government officials were involved in the assassination of President Jovenel Moïse.
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.
Unidentified attackers killed the 53-year-old president. First lady Martine Moïse was wounded and taken to hospital.