[4] In March 2006, the Party of the Democratic Revolution (PRD) designated Ibarra as its candidate to the Senate via proportional representation to serve during the LX (2006–2009) and LXI Legislatures (2009–2012); she won.

She became involved with the community, especially when her son, Jesús Piedra Ibarra, an activist who disappeared on 18 April 1975, in Monterrey, Mexico after the murder of the policeman Guillermo Valdez Villarreal.

As a result of her efforts, including several hunger strikes, 148 out of 557 political prisoners on her lists were liberated during the López Portillo administration (1976–1982).

Ibarra de Piedra served two terms as federal deputy, with the PRT in 1985 and with the Party of the Democratic Revolution (PRD) in 1994.

...I leave... the custody of such precious recognition and I ask you to return it to me along with the truth about the whereabouts of our beloved and long-awaited children and family members, and with the certainty that the justice longed for has finally covered with its protective veil.")