A District man has been convicted in the 1999 slaying of his estranged wife after police renewed the investigation into the crime, authorities said Monday.

Lawrence Davis, 47, was convicted by a jury Monday of first-degree murder in the stabbing death of Elizabeth Patrice Singleton, 32, who was the mother of Davis’s three sons.

According to U.S. Attorney Ronald C. Machen Jr., the slaying occurred on March 1, 1999, when, after dropping off two of their children at school, Davis returned to Singleton’s home in the 1700 lock of A Street SE with their 6-year-old son.

Machen said that while the child sat in the car outside, Davis went inside and attacked Singleton.

Singleton suffered more than one dozen stab wounds to her heart, lungs and back, and died from her injuries, authorities said.

Evidence presented at the trial indicated that the attack followed a series of violent incidents.

In the six months leading up to the attack, Singleton had received civil protection and stay-away orders against Davis, who had attempted to reconcile with her after he spent six years in prison, authorities said.

Davis repeatedly violated the protective orders, authorities said, beating Singleton in September 1998, holding her at gunpoint and raping her in December 1998, threatening to kill her in December 1998, and harassing her in January and February of 1999.

The case of Singleton’s death went cold for 12 years. In that time, the FBI continued working on forensic evidence and was able to develop a partial DNA profile from blood recovered from under Singleton’s fingernails. The DNA profile matched Davis.

Additionally, an eye witness who claimed to have seen Davis in Singleton’s front yard at the time of the murder came forward in 2011.

“After 12 years, the loved ones of a young mother killed in her own home have finally received the justice they deserve,” Machen said in a news release.

Davis is scheduled to be sentenced on Jan. 27, 2012.