(CBS) — Chicago police are continuing to investigate last weekend’s murder/suicide inside the Nordstrom store on North Michigan Avenue, reports WBBM’s Bernie Tafoya.

Chicago Police Superintendent Garry McCarthy revealed a couple of new pieces of information in the murder 22-year-old Nadia Ezaldein. He says Ezaldein had had an incident she reported to police a week before she was killed.

McCarthy also confirmed the 31-year-old suspect’s Marcus Dee’s parents are Chicago police officers.

“The investigative follow-up is into his background, where the gun came from, he actually had a valid FOID card at one time so that’s taking us a little bit longer than we want, and whether or not there was any way that we could have prevented that from happening,” McCarthy said.

The victim’s relatives say she had broken up with Dee a year ago and that he had continued to harass her.

CBS 2’s Roseanne Tellez reports court records show Dee and Nadia’s sister filed dueling orders of protection back in April.

Dee claimed Nagah Ezaldein threatened to “… get me arrested, put a restraining order on me to get me kicked out of the army,” and that she “threatened to have her brother kill me.”

But Nagah claimed back in March Dee “physically abused my sister, cracked her ribs, punched her jaw and fractured it … and put gun in her mouth.”

Citing insufficient evidence, the judge denied both petitions.