The sisters and partner of murdered Belfast man, Robert McCartney, are expected to meet with the US special envoy to the North, Mitchel Reiss.
The five sisters, and Mr McCartney's fiancee Bridgeen Hagans, travelled to the US last month where they met with Mr Reiss and US president, Mr George W Bush.
The family's campaign to get the men who brutally murdered their 33-year-old brother to court has since been hailed a huge success that triggered an international protest against Sinn Fein's continued links with the IRA.
The women's brother, Mr Robert McCartney, died in hospital after he was beaten and stabbed in a Belfast street following a brawl on January 30th.
The sisters claimed this weekend that Sinn Féin has not done enough to bring their brother's killers to justice. Speaking after a short prayer ceremony in the laneway beside Magennis's bar in Belfast where the murder took place, Paula McCartney said republicans knew who were responsible and ought to deliver them to justice.