The Eighth Circuit has determined that an Oklahoma conviction for voluntary manslaughter qualifies as a violent felony under the residual clause of the federal sentencing guidelines. Given the similarity between the residual clause and the definition of a crime of violence in 8 USC 16(b), this case could have persuasive impact on immigration proceedings in circuits that have not struck down 8 USC 16(b) as unconstitutionally vague.
The full text of US v. Steward can be found here:
http://media.ca8.uscourts.gov/opndir/18/01/163886P.pdf