Konanki's week-long disappearance has left investigators puzzled and led her parents to call for an expanded search effort for their daughter, a pre-med student.
Konanki, 20, an Indian national from Virginia, disappeared in the early hours of March 6 while on spring break with friends at the RIU Hotel & Resort in Punta Cana.
According to a source involved in the investigation, Riibe, a former high school wrestler with a strong build, has been "cooperative" with authorities.
Canada had introduced the electricity tariffs on Monday as a retaliatory measure in the ongoing trade dispute, escalating tensions following Trump's earlier tariffs.