A teenager convicted in the brutal rape and beating of a Eugene woman near Autzen Stadium is now accused in the killing less than a month earlier of a woman at a Cedar Mill apartment complex, according to the Washington County Sheriff's Office.

LIVE UPDATES: Sheriff's office talks about teen's arrest in Nicole Laube stabbing death in Cedar Mill

Jaime Tinoco, 17, faces charges of aggravated murder and unlawful use of a weapon in the Aug. 19 stabbing death of 29-year-old Nicole Laube, who lived in Forest Grove and worked at the Commons at Timber Creek Apartments complex, said Sgt. Bob Ray, a sheriff's office spokesman. Tinoco and Laube did not know each other, but Tinoco lived with his parents across Northwest Barnes Road from the place where Laube was killed. Investigators think Tinoco attacked Laube with a plan to sexually assault her.

Jaime Tinoco

Tinoco was indicted on the murder charge late Tuesday afternoon and will be arraigned Thursday in Washington County Circuit Court. He was arrested Wednesday morning in Salem, where he is serving a 14-year prison sentence for the Eugene rape. He was then booked at Washington County Jail.

Four days after his Eugene arrest, Washington County detectives questioned him about Laube's killing, Ray said.

Tinoco admitted last month to beating and raping the Eugene woman after an Oregon Ducks football game. At his sentencing, the teen struggled to hide a smile as his 39-year-old victim recounted being sexually assaulted and repeatedly punched in the face. At the time of the Sept. 13 attack, Tinoco was on probation in Washington County. He broke away from a supervised outing to a University of Oregon football game to commit the crime.

After Tinoco was sentenced, a Eugene detective again questioned Tinoco about Laube's death. The investigator received "significant information" and he notified Washington County detectives right away, Ray said.

"The detectives worked together to obtain information that led them to believe that Jaime Tinoco murdered Nicole Laube," Ray wrote in a news release.

Laube was killed 25 days before the rape.

About 5:10 p.m. on Aug. 19, sheriff's deputies received a 911 call from a resident reporting a stabbing at the Commons at Timber Creek Apartments in Washington County's Cedar Mill area. Laube was fatally stabbed in the chest while she was hanging lease renewal flyers near a parking lot. Wounded in the attack, she staggered to an apartment resident and described her attacker, Ray said. She said he was wearing a dark hooded sweatshirt and camouflage pants.

Laube died at the scene.

A witness also described seeing a man dressed in a dark-colored hoodie at the apartments when the stabbing occurred. The case started as a whodunit, Ray said.

Deputies searched the area but did not find her killer. Investigators did find items nearby, believed to be possibly related to her killing. Investigators, Ray said, are still awaiting results from the crime lab's forensic analysis.

Based on witness accounts, investigators drafted a composite sketch of a suspect and released it Sept. 15. Dozens of tips poured in, Ray said, but no arrests were made.

On Sept. 13, Tinoco was arrested in Eugene. In that case, Tinoco followed his victim, knocked her out from behind and dragged her to bushes near Autzen Stadium at about 8 p.m. -- six hours after the game let out. He continued punching her and raped her.

Eugene Police found Tinoco at a nearby footbridge and detained him, the prosecutor said. He had blood on his clothes and shoes.

Tinoco pleaded guilty in March to first-degree rape, first-degree sex abuse, first-degree kidnapping and second-degree assault. The following week, a Lane County Circuit Court judge sentenced him to 14 years in prison. His apparent lack of remorse warranted the long sentence, she said. And the community, the judge said, needed to be protected from a "dangerous man."

The prosecutor said in court that the level of rage Tinoco exhibited toward the woman was disturbing. Tinoco's attorney said her client started smoking marijuana at 12 years old and later moved on to methamphetamine -- going on benders that lasted seven to 10 days. The drug use likely affected his brain, she said.

He's the oldest of three children, and his parents tried to help him, his attorney described. But they couldn't get through to him by the time he started using meth. At the time of the attack, he wasn't working or going to school, according to the juvenile department. Ninth grade was the last he attended.

The rape occurred during a field trip that was part of a Washington County program to help teens in lieu of jail time. Tinoco was sentenced last July to supervised probation for burglary, meth possession and harassment.

The juvenile department has changed its policies following an administrative review of what happened.

Everton Bailey Jr. of The Oregonian staff contributed to this report.

-- Rebecca Woolington

503-294-4049; @rwoolington