Kristin Cavallari's older brother, Michael Cavallari, is still missing. However, a new report has surfaced, which reveals some shocking information regarding Cavallari's prior arrest.

According to an incident report from the Orange County Sheriff's Department and obtained by Entertainment Tonight, 30-year-old Michael Cavallari was arrested on Nov. 23. As it turns out, an unnamed informant, who happens to be female, called the Sheriff's Department to report Michael Cavallari. The woman claims that the two had a previous "verbal dispute" on Nov. 11.

As per the report, the informant told deputies that, "she was in fear of him" after the incident, "but did not contact the Sheriff's Department because she didn't want to escalate the situation."

The Sheriff's Department told the publication that the informant had reported the same thing "for several weeks after the incident, Michael kept knocking on her door, but she refused to answer."

It was on Nov. 23 that the informant heard a sort of "tapping" on her door. After looking through the window, she saw that Michael Cavallari was holding a standing in the hallway between her apartment and the parking lot. Apparently, Michael "[had] a shotgun pressed to his shoulder and the barrel raised parallel to the ground, aiming down the path."

Furthermore, the statement from the Sheriff's Department continued: "While responding to the address, Michael Cavallari notified dispatch he had a shotgun and was going to Dana Point City Hall." The report also stated that deputies responded to the said City Hall following the call, and then contact Michael. Michael Cavallari had "a strong odor of an alcoholic beverage coming from his breath."

Michael Cavallari admitted to having a loaded shotgun in his trunk prior to being arrested. He responded with a "yes" after being read his Miranda Rights, as reported by the Sheriff Department's statement, which also states that Cavallari "denied doing anything or saying anything to the victim/informant."

According to WGN TV, Utah authorities state that Michael Cavallari has yet to make "contact with anyone since his car was found in a desolate stretch of Southern Utah on Nov. 27."