Rider was booked Monday on murder, aggravated assault and theft charges. He appeared in court Thursday.
Cassandra Bjorge, 17, and Johnny Rider, 19, are suspects in the deaths of Bjorge’s grandparents.
Christopher Bjorge, the couple’s son, gave Channel 2 a statement at Friday’s court hearing.
“We are all upset and hurt by this devastating loss,” he said. “My mother and father were both kind and gentle people who loved to help others.”
Cassandra Bjorge is due back in court April 21, Channel 2 reported.
A teenage couple has been accused of stabbing, punching, kicking and using a tire iron to kill Wendy and Randall Bjorge, the grandparents of suspect Cassandra Bjorge, 17.