CLEVELAND, Ohio – The second U.S. Attorney charged with conducting a federal investigation into the death of Lowndes High student Kendrick Johnson has resigned.

Steven Dettelbach served as U.S. Attorney for the Northern District of Ohio for the past seven years. He announced his resignation Wednesday. Dettelbach will leave his post on Feb. 5 to join the BakerHostetler law firm, where he worked before he was appointed by President Barack Obama in 2009, reports Cleveland.com.

The Northern District of Ohio was tasked with continuing a federal review of the Kendrick Johnson case after Michael Moore, the U.S. Attorney who began the investigation, resigned from the Middle District of Georgia in November.

Dettelbach’s office confirmed to ValdostaToday on Wednesday the investigation into Johnson’s death is ongoing.

“Our office has been asked to oversee the investigation and is doing so,” said Michael Tobin with the Northern District of Ohio.

Kendrick Johnson’s body was found upside down in a vertically-stored athletic mat at Lowndes High School on Jan. 10, 2013. A state autopsy ruled the 17-year-old’s death accidental, but Johnson’s parents insist their son died of foul play. The federal review of the Johnson case in its third year.