According to an investigation from the Office of Inspector General, Ross misrepresented the reason for the question before House committees in March 2018 on two occasions. Making false statements before Congress is a federal crime.

The results of the probe were presented to the Department of Justice, but attorneys have chosen not to prosecute Ross. Inspector General Peggy Gustafson sent a letter to congressional leaders last week that detailed the results of the investigation as well as noting the Department of Justice declined prosecution.

For more reporting from the Associated Press, see below.

An inquiry to the Department of Justice on Monday didn’t get an immediate response. No one answered the phone Monday at a Palm Beach, Florida number listed for Ross.

The Supreme Court eventually blocked adding the query ahead of the 2020 census, but critics say that by pursuing the citizenship question, the Trump administration sought to suppress participation by noncitizens and minorities in the nation’s once-a-decade head count.

According to critics, the citizenship question was inspired by Republican redistricting expert Tom Hofeller, who had previously written that using citizen voting-age population instead of the total population for the purpose of redrawing of congressional and legislative districts could be advantageous to Republicans and non-Hispanic whites.

The inspector general probe was launched in 2019 at the request of Democratic congressional leaders who said they were concerned that the Trump administration had hidden the role of the Republican redistricting expert while trying to add a citizenship question to the census questionnaire. The Commerce Department oversees the Census Bureau, which compiles and crunches the numbers used to determine political power and the distribution of federal funds.

The inspector general investigation was unable to establish that Hofeller played a major role in the attempt to add the citizenship question to the census form, Gustafson’s letter said.

During his congressional testimony, Ross testified that the Department of Justice requested adding the citizenship question to the census form in late 2017 for the purpose of enforcing federal voting rights law. But the inspector general probe said that “misrepresented the full rationale” since Wilbur’s staff had been communicating with the Department of Justice many months before the request was made.

The evidence suggested that the Commerce Department requested and played a part in drafting the Department of Justice request, the inspector general probe found.

A memorandum Ross sent to Commerce Department officials said he had been considering adding the citizenship question soon after Trump appointed him to lead the department, according to the probe.