Dawson County Sheriff’s Office paid call at the Koch family home at around 9:45 a.m. on May 10. There they found the bodies of Jeremy, his wife, Bailey Koch, 41, and the couple’s two sons, Hudson, 18, and Asher, 16.

The family’s relatives have said that Jeremy’s own mental health issues date back to at least 2009 and included multiple suicide attempts.

Bailey’s father, Lane Kugler, wrote in an open letter on social media that he discovered the bodies of his daughter, grandsons, and son-in-law on Saturday morning.

“What I saw will haunt me for the rest of my life,” he wrote, adding that he’s “so angry” over the alleged murder-suicide and the failed attempts to help Jeremy.