BOISE, Idaho (AP) — A 22-year-old Idaho man charged with killing a former Arizona power company executive, his wife and their adult son at a Boise home last month appeared in court Thursday but didn't enter a plea.

Three counts of first-degree murder as well as robbery and other crimes were read Thursday in 4th District Court to Adam Dees of Nampa. A grand jury indicted Dees on April 8. Prosecutors say they believe Dees killed 80-year-old Theodore M. Welp, 77-year-old Delores Elaine Welp, and 52-year-old Thomas P. Welp on March 8 or 9.

All three victims were shot in the head and beaten with a baseball bat, according to the indictment. Thomas Welp was also stabbed in the neck, the indictment says. Dees' next court appearance is May 14.