A U.S. District Court dismissed a lawsuit against Pop Warner over the deaths of two brothers tied to concussions.

According to the San Diego Tribune, Kimberly Archie, of Los Angeles, and Jo Cornell, of San Diego, sued the youth football organization for alleged negligence that resulted in the deaths of their sons. One son died by suicide and another in a motorcycle accident, according to the Union-Tribune. An examination of their brains determined that both suffered from chronic traumatic encephalopathy (CTE).

In his ruling, Judge Philip S. Gutierrez wrote that he didn’t see a clear cause-and-effect to the tragedies. He wrote, “The Court cannot conclude that Plaintiffs have presented evidence to create a triable issue as to actual causal causation which is not speculative.” He added that the jury would have to assume that playing Pop Warner football “resulted in sufficient head impacts to cause CTE.”