Beyonce put the spotlight on the killing of Mario Woods ... and no one's more grateful than Mario's mother.
Adante Pointer, an attorney for the Woods' family, tells us Mario's mother, Gwen, loved Beyonce's halftime performance, especially the show of support for her late son.
We're told Gwen had no clue Bey was going to reference Mario. She's glad to know celebrities feel a connection to Mario, spreading the message to millions.
Beyonce's backup dancers held up a "Justice 4 Mario Woods" sign on the field ... the 26-year-old was shot and killed by San Francisco cops.
We're told Gwen would love to follow up with B ... if the singer's interested in speaking.