The head of the U.S. Department of Justice is scheduled to arrive in Ferguson, Missouri, and observe the situation in the St. Louis suburb following the death  of 18-year-old Michael Brown the subsequent ongoing protests. Ahead of his trip, Attorney General Eric Holder wrote a letter to Ferguson residents.

President Barack Obama announced on Aug. 14 that he's tasked the FBI and Justice Department to "independently investigate" Brown's death. At another press conference, the president confirmed Holder will meet with community leaders in Ferguson and will update Obama on developments.

Ahead of Holder's trip to Ferguson on Wednesday, the attorney general wrote that he, along with the Justice Department, "intends to learn -- in a fair and thorough manner" what happened on Aug. 9, the day Brown was shot and killed. Holder disclosed that the Justice Department's presence in Ferguson has been ongoing since last week with the Civil Rights Division's investigation.

"The full resources of the Department of Justice have been committed to the investigation into Michael Brown's death," wrote Holder, via the St. Louis Post-Dispatch. "This inquiry will take time to complete, but we have already taken significant steps."

Holder noted the resources dispatched in Ferguson include nearly 40 FBI agents and prosecutors from the Civil Rights Division to lead the investigation. Holder further revealed "hundreds" of individuals have been interviewed in connection to Brown's death.

"We understand the need for an independent investigation, and we hope that the independence and thoroughness of our investigation will bring some measure of calm to the tensions in Ferguson," Holder added.

In addition to providing an update to the investigation, the U.S. attorney general said he wants to see an end to the violence. He noted the violence has been committed by a "very small minority" and even by people who don't live in Ferguson. Holder said the violence interrupts the intent of the "legitimate" protests and demonstrations in the St. Louis suburb.

Holder also addressed the actions of the law enforcement. According to the attorney general, law enforcement is also responsible for helping ease tensions in Ferguson, but "good law enforcement" requires trust between the public and police.

"Enforcement priorities and arrest patterns must not lead to disparate treatment under the law, even if such treatment is unintended. And police forces should reflect the diversity of the communities they serve," wrote Holder.

As Latin Post reported, two-thirds of the Ferguson population is black, but the city's police force is predominantly white, with 47 white officers and three black officers.

Law enforcement methods have been questioned in Ferguson. Police have used tear gas, rubber bullets and armored vehicles. Holder pledged to the residents of Ferguson that the investigation of Brown's death will be "full," "fair" and "independent." He also assured that there will be conversations with community leaders and law enforcement to close the gap between any hostility.