If the Cowboys think that this signing, as well as a potential return of Randy Gregory, crosses DE off the list of positions to be upgraded, then they haven't learned a thing.
If it's a no risk signing to see if you catch lightning in a bottle, but buttress it with investment in a guy like K'Lavin Chaisson or an edge guy like Zack Baun, then I kind of get it.
Smith is a train wreck as a human being. His issues do seem to be substance abuse/alcohol based, but domestic violence for me is an in-the-box offense. I wouldn't touch him with a ten foot pole, but it's too late at this point.