He can start with New York City (NYC) and Mayor Bill De Blasio.  This writer warned that Mayor De Blasio and New York City were planning to destroy the evidence they collected on illegal aliens who applied for the NYC Identification Card.  [New York City Planning To Destroy Evidence In A Criminal Investigation, by Federale, Federale Blog, December 3, 2016]  The purpose of those municipal ID cards was to aid and assist illegal aliens to remain in the United States, and so is the planned destruction of those records.  Both acts are violations of Title 8 United States Code Section 1324, Bringing and Harboring Illegal Aliens.

Recently, Attorney General Jefferson Beauregard Sessions announced that the Department of Justice (DOJ) and the United States Attorney's Offices which prosecute most Federal crime would be required to increase criminal prosecutions of persons involved in assisting illegal aliens.

Starting today, federal prosecutors are now required to consider for prosecution all of the following offenses:

The transportation or harboring of aliens. As you know too well, this is a booming business down here. No more. We are going to shut down and jail those who have been profiting off this lawlessness — people smuggling gang members across the border, helping convicted criminals re-enter this country and preying on those who don’t know how dangerous the journey can be.

[Attorney General Jeff Sessions Delivers Remarks Announcing the Department of Justice’s Renewed Commitment to Criminal Immigration Enforcement, Justice Department Press Release, April 11, 2017]

This specifically refers to 8 USC 1324, as supported by the accompanying memorandum to all prosecuting attorney in the DOJ.

Each District shall consider for prosecution any case involving the unlawful transportation or harboring of aliens, or any other conduct proscribed by 8 U.S.C. 1324.

That is a very wide net that AG Sessions is casting.  And it certainly covers Mayor De Blasio and, more importantly, his plan to destroy the evidence in his crime of aiding illegal aliens.

NEW YORK CITY (WABC) — A judge ruled that New York City is legally allowed to destroy personal documents associated with its municipal identification program.

However, the judge also issued a stay Friday - postponing any action until April 17, pending an appeal.

Two Republican state Assembly members have sought to prevent the destruction of documents, such as copies of foreign passports, used to verify a person's identity to obtain the IDNYC card.

Representative Ronald Castorina, Jr., is one of them.

"The program itself has a scant vetting process, so by virtue of obtaining the card, there's a question as to whether or not the individual should have a government-level ID," he said.

Judge Philip G. Minardo decided purging information from the IDNYC card, a program that began two years ago and has issued more than one million cards, is not a threat to national security.

[Judge: New York City Allowed To Destroy ID-Related Documents, WABC, April 7, 2017]

Mayor De Blasio conveniently confesses that the program was designed to assist illegal aliens to remain in the United States and that destruction of those records will further assist those illegal aliens.

Mayor Bill de Blasio said New York City supports the ruling and will reject any attempt to appeal it.

"IDNYC was created to protect people and connect them to vital services," he said. "And today's decision ensures it will continue to do just that."

Time for AG Sessions to order the FBI to either subpoena those records or obtain a search warrant to seize those records before the records are destroyed.  AG Sessions can talk the talk, but can he walk the walk?  We shall see.