As a junior, Broomfield recorded 85 tackles, three interceptions, and three fumble recoveries, making the Class 5A second-team all-state.

In addition to football, Broomfield was a four-year letterman in track and field and was an honor roll student.

Considered a two-star recruit by Rivals.com, he was given a Rivals Rating of 5.2[1] He accepted a scholarship offer from Iowa State.

In his sophomore season, 2011, Deon played in all 13 games and made 23 tackles, including five in an upset win over the No.

[3] On January 31, 2020, Broomfield was hired as a defensive assistant for the Houston Texans of the National Football League (NFL).