A woman who was allegedly shot by her son Wednesday afternoon told investigators that she sensed something was “not right” when she stopped by his Midtown apartment.

Paino Alvarez-Perdomo, 29, was arraigned Thursday on charges of first-degree assault and third-degree weapons misconduct.

Officers initially responded just after 2 p.m. Wednesday to the Golden Corral restaurant at 4520 Union Square Dr., where they found Altagracia Guillen with a single gunshot wound.

Heavily armed officers and SWAT team members subsequently flooded into Midtown, surrounding the Arctic Sun Apartments at 625 W. 46th Ave., near the intersection of Tudor Road and Arctic Boulevard. Alvarez-Perdomo walked out of the building and surrendered to police.

According to charging documents in the case (PDF), Guillen told police that Alvarez-Perdomo had called her Wednesday and asked her to visit him at the apartment building. When she knocked on the door to his apartment, her son asked her to come inside.

“Ms. Guillen could tell that (Alvarez-Perdomo) had something behind his waistband, but she could not see what it was,” prosecutors wrote. “Ms. Guillen could tell something was ‘not right’ and refused to go inside the residence. (Alvarez-Perdomo) then pulled out a revolver from behind his back and shot Ms. Guillen in the abdomen.”

Guillen then ran away, hearing a second shot. She didn’t stop until she reached the Golden Corral, slightly east of the apartments along Tudor Road near its intersection with C Street. Medics took Guillen to the hospital, where she was treated and released Wednesday.

APD officers who searched Alvarez-Perdomo’s apartment found a .38-caliber revolver in the back bedroom containing five shells, two of which appeared to have been discharged. His record includes several Alaska convictions for offenses including assault, resisting an officer and disorderly conduct -- leading to Wednesday’s weapons-misconduct charge, for being a convicted felon in possession of a weapon.

Alvarez-Perdomo was arrested Wednesday evening and held on $10,000 cash bail, with a third-party custodian required for release. He entered a plea of not guilty in response to the charges Thursday, as his mother watched in the courtroom.

Channel 2’s Albert Lutan contributed to this report.