laid flowers and a teddy bear at the spot where the former nfl running back was killed in an apparent road rage incident. his mother in shock. >> i just couldn't believe that my child was going and he didn't really ask for that. >> reporter: his sister missing the younger brother. >> he always made sure he never lost that big kid in him, and you could see the videos with his son, he's running around with his son like he never lost his step. he's our brother. our protector. so he will keep protecting us no matter where. >> reporter: this morning, the man who investigators say admitted to shooting mcknight is free. authorities leased him from custody on friday saying they need to conduct a thorough investigation before deciding what if anything he will be charged with. >> this investigation is not going to be moved, influenced,