'Roswell, New Mexico': Liz's search for answers leads her to Grant Green, could he have been Rosa's lover?
The synopsis of the show mentions Liz meets a new character named Grant Green, who apparently seems to know something about Rosa's death

The CW reboot of the '90s cult classic, 'Roswell', might take up the same topic of the three alien siblings disguised as humans residing on earth, but the show chiefly revolves around a mystery involving the death of a main character.
Starring Nathan Parsons as Max Evans, Jeanine Mason as Liz Ortecho, Amber Midthunder as Rosa Ortecho, Lily Cowles as Isobel Evans, and Michael Vlamis as Michael Evans, 'Roswell: New Mexico' finds Liz returning to her hometown only to discover some untold truths about her sister, Rosa's death. The mystery intensifies as Liz has to confront an unusual truth about her childhood sweetheart, Max, who revealed to her he and his siblings, Michael and Isobel, are actually aliens.