A young man walked into an Indiana police department Sunday night and allegedly confessed to killing his girlfriend in 2014, according to local police.
Connor Scott, 24, allegedly admitted to killing 20-year-old Kaylyn Whitaker, who died on Oct. 31 in Martinsville, Illinois, according to the Danville, Indiana, police department.
Whitaker was shot in the head and found at Scott's home, according to Indiana news site mywabashvalley.com.
(MORE: Chris Watts seen confessing to wife's murder in newly released video)Her death was "originally called a suicide, but later ruled a homicide" after about 10 months, the Danville police said in a statement on Monday.
"This is a homicide case, it has been since 2015. And nothing's being done about it and I am angry," Whitaker's mother, Leslie Roberts, told mywabashvalley.com in Dec. 2018. "We deserve closure. We deserve peace."
The cold case heated up at about 8:30 p.m. Sunday, when Scott, who had been living in Danville, Indiana, for about six months, went to the local police department, authorities said.
(MORE: Suspect describes killing childhood friend and dumping her body in alleged confession tape: 'It took me half an hour to kill her')Police interviewed Scott and allegedly "obtained a taped confession regarding the murder," according to Danville police.
Details on the alleged confession have not been released.
Scott was taken to the Hendricks County Jail and is expected to be extradited to Illinois, police said.
(MORE: FBI 'unraveling true extent' of convicted killer's crimes after he confesses to 90 murders)Illinois State Police investigators have traveled to Danville to meet with Scott, police said.
An arrest warrant was issued for Scott Monday and first-degree murder charges are pending, according to the Illinois State Police.
The Clark County State's Attorney's office in Illinois declined to comment.
ABC News' Ben Stein contributed to this report.