On Criminal Minds
Desiree's father was killed in the line of duty, forcing her mother Fran to raise her and her siblings alone.
She and her siblings visit their mother in Chicago for her birthday and present when her brother is arrested on suspicion of murdering three young boys. She, like her sister Sarah, believe in Morgan's innocence, proving the closeness of the three siblings.
She reappears in this episode when she calls Fran on the road before spotting her presumed-dead cousin, at a traffic stop, having been held captive by Malcolm Ford. The car carrying Cindi speeds off when Desiree calls her, and Desiree tries to pursue the vehicle, only to be hit by an oncoming car. She is sent to the hospital and survives; Desiree tells Morgan about her sighting of Cindi, saying that she is confident the woman was her. She isn't seen for the rest of the episode, but she most likely recovers from her wounds.