As KHOU 11 News first reported Wednesday morning, the U.S. Marshals Service and Gulf Coast Violent Offenders Task Force worked with Mexican authorities to track him down and arrest him.
Timeline: The murder of Cpl. Galloway
12 a.m.: According to court documents, Rosales' common-law wife, Reina Marquez, told detectives that he came home to pick up her white Toyota Avalon. She said Rosales removed two long guns from his safe and told her he was going hunting and shooting with friends. He left in the Avalon with license plate LYL0927, according to Marquez.
12:30 a.m. Galloway, who was working nights so that he could train deputies, pulled over a white Avalon in the 9100 block of Beechnut Street. As Galloway was notifying dispatch, video shows the driver get out of the car and open him fire on him with what police later described as an assault rifle. Galloway's bodycam and dashcam video show multiple gunshots shattering the windshield. Rosales then drove away.
12:50 a.m. The Houston Fire Department responded to the scene and found Corporal Galloway dead with multiple gunshot wounds. The medical examiner later said a gunshot wound to his face was what killed him.
HPD investigators say they used footage of the shooting to get the license plate of the Avalon and found it is registered to Reina Azucena Pereira Marquez at 5500 block of Calm Court in Houston.
When investigators later went to Reina Marquez's residence, they say she admitted the car was hers and identified photos of the shooter as Rosales, her common-law husband.
2:12 a.m. The Precinct 5 Constable's Office tweeted that one of their own had been shot and killed. The news sent shockwaves through the community and condolences poured in from fellow law enforcement agencies, community leaders and private citizens.
4:50 a.m. Houston police and Pct. 5 Constable Ted Heap gave an update on the case and described Galloway as a mentor to young law enforcement officers
“He was very much loved by the women and men he served with,” said Heap. "There's a lot of broken up officers who he meant a lot to in their lives."
Heap says Corporal Galloway decided to go on a night shift so that he could be a field training officer.
"He was the one who was sitting in the front seat with them. He was the one who was teaching them what to do and how to get safely to their families."
3:38 p.m. The Avalon was found at the Falls of West Oaks apartments on Texas 6. Court documents say the manager confirmed that Reina Marquez leased an apartment there. While detectives were watching the Avalon, court documents say they saw Reina and a man later identified as her brother wiping the car down and removing items from it. Both were arrested. They say Reina later confirmed that her brother Henri Marquez lives in the apartment she leases.
She told detectives that Rosales dropped off the car there and took her brother's cell phone and Lexus.
After getting a search warrant, investigators say they seized a tablet, cleaning supplies and the title to the Lexus from inside the apartment.
Reina and Henri were charged with tampering with evidence.
2 p.m. Houston police, Precinct 5 and Harris County District Attorney Kim Ogg held a news conference to announce that they had identified Rosales as the shooter but he was on the run.
"This is a ruthless, savage execution and somebody like this needs to be removed from the streets and removed from the streets very quickly. But we cannot do it without the help of the public," Pct. 5 Constable Ted Heap said.
Police Chief Troy Finner said Rosales was known to disguise his appearance but vowed to bring him to justice.
"He's a very dangerous individual and we're gonna move his butt off the streets as soon as we can," Finner said.
They announced a $60,000 reward for information leading to the arrest and conviction of Rosales.
Still no sign of Rosales, but court documents obtained by 11 News shed new light on what happened before, during and after Cpl. Galloway was gunned down.
9:50 a.m. KHOU 11 News was the first to report that Oscar Rosales had been arrested in Mexico by the U.S. Marshals Service and Gulf Coast Violent Offenders Task Force. They worked with Mexican authorities to track him down.
Around noon: Rosales was walked across the border and turned over the U.S. authorities. He was taken to the Valverde County Jail and locked up.
Wednesday evening: Rosales was taken to a private airport where he was put on a plane bound for Houston with local law enforcement officers.
Wednesday night: Rosales arrived back to Houston to face capital murder charges. At Hooks Airport, police were waiting with Cpl. handcuff's when the suspect got off the plane. He was taken directly to the Harris County Jail.
Thursday morning: Rosales, dressed in a yellow jail jumpsuit and surrounded by seven law enforcement officers, faced a Houston judge who ordered him held without bond.
During the court appearance, Prosecutors said Rosales was out on bond for aggravated assault with a deadly weapon when he allegedly killed Cpl. Galloway.
We also learned that Rosales was born in Mexico, is a citizen of Guatemala and has been living in Houston where he worked as a mechanic for the last 20 years.
Corporal Galloway funeral information
Funeral arrangements were announced for Cpl. Galloway.
The funeral service will be held on Tuesday, Feb. 1 at Second Baptist Church - West Campus, which is located at 19449 Katy Freeway. It will be open to the public.
The service will also be live streamed by the church.