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The Giants defensive staff is starting to fill out.

(Amanda Marzullo | NJ Advance Media)

The Giants' staff is starting to fill out. They are adding former Rams defensive coordinator Tim Walton as their defensive backs/secondary coach, a person with knowledge of the situation told NJ Advance Media.

The individual requested anonymity because the move was not yet official.

Walton served as the Rams defensive coordinator in 2013. He was pushed out when St. Louis hired Gregg Williams, and spent this past season away from the game.

Walton previously was the Lions defensive backs coach (2009-12) under Jim Schwartz. Walton replaces Peter Giunta, who was fired last week along with defensive coordinator Perry Fewell.

The Giants are still searching for a new defensive coordinator. They interviewed Steve Spagnuolo on Wednesday for the position, although nothing was finalized on that end as of early afternoon. Spagnuolo is considered the heavy favorite to land the position he once held with the team.

Walton, 43, interviewed for the Giants position last week.

Jordan Raanan may be reached at jraanan@njadvancemedia.com. Follow him on Twitter @JordanRaanan. Find NJ.com Giants on Facebook.