The family of one of the 4 slain Idaho college students isn't holding a funeral yet because they're worried the killer might be there

• The family of one of the slain Idaho students hasn't had a funeral yet for their daughter.
• Part of the reason is because they're worried the killer may show up to the service.

The family of one of the four slain University of Idaho students has not had a funeral for their daughter yet, partly because they can't be sure that the killer — who still has not been caught — won't attend.

Steve Goncalves, whose 21-year-old daughter Kaylee Goncalves was killed in the attack earlier this month, told ABC News in an interview published on Tuesday that his wife was fearful about the killer possibly showing up to a funeral service.

"My wife's biggest fear, part of the reason we didn't have a funeral, is because she couldn't be guaranteed that that monster was going to not be there," Steve Goncalves told the news outlet. "I haven't earned the ability to grieve the way I want to grieve."

"I want to be able to have justice first," he added.

The small city of Moscow, Idaho, has been on edge since the November 13 killings of Kaylee Goncalves, Madison Mogen, 21, Xana Kernodle, 20, and Ethan Chapin, 20.

The four friends were stabbed to death — likely while they were asleep, a local coroner said — inside an off-campus home near the college following a night out.

Investigators have repeatedly described the attack as "targeted," though they have not made any arrests or identified a suspect in connection to the slayings.

"I know that there's some really good, hard-working guys and girls that are on this case that I've met," Steve Goncalves told ABC News. "And they looked me in the eyes and they told me straight-out that they're working and they're doing everything in their power."