An unidentified student, center, is united with a loved one in Omaha, Neb., Wednesday outside the Millard South High School.

OMAHA, Neb. — An assistant Omaha high school principal who was shot in her office Wednesday afternoon died from her injuries.

Police officials announced Vicki Kaspar had died. She would’ve turned 58 today.

Police said Robert Butler Jr., a 17-year-old Millard South High School student and son of an Omaha police detective, shot Principal Curtis Case and Assistant Principal Kaspar inside the school just before 1 p.m. Butler did not shoot any students.

Case was listed early Wednesday evening in serious but stable condition at Creighton University Medical Center.

Butler was found dead in a car from a self-inflicted gunshot wound at about 1:30 p.m.

Millard Superintendent Keith Lutz described Case as “young and energetic … I’m sure he’ll pull through this.”

Robert Butler Jr. was the son of Omaha Police Detective Robert Butler and attended Lincoln Southwest High School last year. A person familiar with the investigation said it is believed Robert used his father’s Glock.

The younger Butler’s body was found dead in a parking lot. On an update to his Facebook page, filed from a mobile phone, Robert wrote:

“Everybody that used to know me I’m sry but Omaha changed me and (expletive) me up. and the school I attend is even worse ur gonna here about the evil (expletive) I did but that (expletive) school drove me to this. I wont u guys to remember me for who I was b4 this ik. I greatly affected the lives of the families ruined but I’m sorry. goodbye.”

Lincoln school officials said Wednesday that Butler transferred from Lincoln Southwest High School to Millard South on Oct. 6 but had not been forced to transfer.

“He was popular with students and seemed real pleasant,” said Southwest Principal Rob Slauson, who described Butler as “a fairly normal, average” student.