Out of court statements not subject to the Confrontation Clause and hearsay scrutiny had sufficient indicia of reliability to establish the drug quantities used at sentencing.
http://media.ca1.uscourts.gov/pdf.opinions/17-1490P-01A.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.