The Code of the Scarlet (1928)

Bruce Kenton ('Ken Maynard'), a Royal Canadian Mounted Policeman, is on the trail of an outlaw, Frank Morgan (Robert Walker), who is the brother of the girl, Helen Morgan (Gladys McConnell, that Bruce loves. Bruce does not know this, so he is puzzled as to why Helen aids the fugitive, and suspects he is her sweetheart. To compound the problem, the crook who has framed Frank shoots him and Helen thinks Bruce did it.