Richards had been camping near Coldwater Golf Links near the “dead end of South Maple Avenue in the 600 Block.”

An acquaintance Richards had camped with alleges the suspect “made a statement to the effect of having an urge to rape and kill a woman.”

When the acquaintance, identified in a criminal complaint as “D.B.” First encountered police near the scene, he “made a statement to the effect ‘what did he do to her?’”

Police said Barquín Arozamena suffered stab wounds to the upper torso, head and neck. A knife was recovered that had been in the possession of Richards.

Richards was in possession of a backpack containing two pairs of shorts that tested positive for blood, police said.

Richards was observed to have fresh scratches on his face consistent with fighting, and he “attempted to conceal a deep laceration in his left hand, which he attempted to bury in the ground.”

Richards was arrested late Monday and booked into the Story County Jail early Tuesday morning.