A Milwaukee man and American Ninja Warrior contestant is on a mission to find his baby sister, and needs your help to do it.
David Alvarez was featured on Wednesday night's show, saying he is competing in hopes his sister will see him.
The two were separated in the foster care system when he was 13 and she was 2-years-old. He's tried to track her down, but so far he's had no luck.
"The last memory that I have with her is them pulling me away and her standing in this glass window and she's just crying and you know, sobbing," Alvarez said.
He ran the course with his sister Wallyssa's name on his shirt, making it all the way to the finish.
If you have information on where his sister might be, Alvarez is asking people to contact him through Instagram .