A Riverside man has been accused sexually abusing a victim and threatening to kill her.

Nikolas Petersen, 33, was charged on Nov. 16 with first-degree burglary, child endangerment, and second-degree sexual abuse.

According to the arrest affidavit, Petersen entered the victim’s Iowa City residence without permission. Peterson proceeded to cause injury to the victim’s head, slam the victim onto a bed, and sexually assaulted her.

When the victim tried to flee the residence, Petersen caught her and began to punch and choke her. The victim blacked out momentarily, the affidavit said. Petersen then threatened to kill the victim by holding a knife to her throat.

During the altercation, Peterson also grabbed the victim’s 11-year-old child while holding the knife.

First-degree burglary and second-degree sexual abuse are Class-B felonies.