Tim Kern, who was stabbed outside the Arlington Central Library in June along with his twin brother, died Saturday. A Fairfax County Police Department spokesperson said that police do not suspect foul play and that injuries from the machete attack did not contribute directly to his death.

The spokesperson, Lucy Caldwell, said that the cause of death will be released after officials complete a toxicology report. Kern, 26, died at the homeless shelter where he and his brother Brian had stayed.

Brian and Tim Kern were attacked in their sleep about 3 a.m. on June 24. Derrick Sutherland, a 28-year-old homeless man, has been charged with malicious wounding in the attack.

Arlington County District Court Judge Thomas J. Kelley Jr. last week ordered that Sutherland’s mental competency be evaluated.