The neurosurgeon and former cabinet minister was sworn in on Tuesday and promptly called for unity, promising to meet with various sectors to build consensus.
“The task that awaits us is complex and difficult…I’m from a school that believes in dialogue,” he said.
At a ceremony in the Caribbean country’s capital, Port-au-Prince, he also thanked unnamed “sister nations” for their help with the ongoing investigation into the attack, demanding all those responsible be brought to justice.
Mr Henry has promised to form a provisional consensus government to lead the country until elections are held.
He said he had already met with various unidentified stakeholders as well as people from the civil service and the private sector.
He pledged to re-establish order and security and confidence in the government as well as fight corruption, make COVID-19 vaccines available to all, restart the economy and create a credible and transparent elections system.
At least 26 people, including 18 former Colombian soldiers, five Haitians and three Haitian-Americans, have been arrested after Mr Moise was shot dead.
Police chief Leon Charles announced four more formal arrests on Tuesday – at least three of them police officers, whose ranks he did not release.
“There was infiltration in the police,” he said. “It happened with money.”
Mr Charles said authorities were investigating who financed the operation, noting the FBI and Interpol were helping track down US citizens living in the United States who he believes are responsible.
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