Michael Ramia and Marisa Schetz place flowers at the apartment where their co-worker Carlos Zaragoza's family was shot in the Canoga Park section of Los Angeles on Friday, July 26, 2019. Police said Zaragoza killed his father and brother and wounded his mother at the apartment complex. (AP photo/Stefanie Dazio)

LOS ANGELES (AP) — Mourners left armloads of flowers and lit tall candles Friday to remember four victims who were killed in a shooting rampage across Los Angeles' San Fernando Valley that rattled the community during a 12-hour manhunt a day earlier.

Friends, neighbors and co-workers were in disbelief after the arrest of 26-year-old Gerry Dean Zaragoza in the killing of his father, brother and two other people, and the wounding of his mother and another man.

Police remained tight-lipped about a motive behind Thursday's violence. The owner of a company where Zaragoza's father worked said he had confided that his son had a drug problem.

"I can't believe it," Michael Ramia, who owns a carpet cleaning company, said as he looked at a growing memorial of flowers and candles outside the door of the Zaragozas' apartment in Canoga Park. "I just feel like knocking on the door and going, "Carlos, Carlitos!'"

It was not clear whether Gerry Zaragoza had an attorney. He has not yet been arraigned.

Police would not say if officers had been called to the residence previously.

Zaragoza is accused of killing his 56-year-old father, Carlos I. Zaragoza, and his 33-year-old brother, Carlos Pierre Zaragoza, and wounding his mother, Blanca Zaragoza, at the family's apartment.

Police said Gerry Zaragoza then fatally shot acquaintance Azucena Lepe, 45, and critically wounded a man at a gas station in North Hollywood, where a small memorial of candles stood with a photo of Lepe.

Employees declined to comment. Lepe's family could not be reached.

Lepe's brother, Cuco Lepe, told KTLA that Gerry Zaragoza was obsessed with his sister "Susie," even though they never had a relationship. Lepe said Zaragoza had been harassing his sister for over a year.

"It was probably the most horrible moment of my life," Cuco Lepe told the station about learning that his sister had been killed.

Authorities said Zaragoza also attempted to rob a man outside a bank in Canoga Park and then fatally shot a bus passenger in Van Nuys before he was taken into custody by police and FBI agents. The name of the passenger has not been released.

Ramia and employee Marisa Schetz dropped off a bouquet of white and yellow flowers Friday at the Zaragoza home.

They said Carlos Zaragoza often expressed frustration at his son's drug problem and wanted him to work at the company, but he never showed up. They said they didn't know any family issues had escalated.

"Carlos never told me he was scared," Ramia said.

They described Carlos Zaragoza as an upbeat employee who trained other technicians and would chastise them if they complained. The company made a framed photo collage of him, signed by employees, and put it behind a burning candle.

Ramia said he would dedicate a carpet cleaning truck to his employee.

Susie Torres, 54, of Sherman Oaks said she met Blanca Zaragoza more than 20 years ago when Torres' father and Zaragoza worked at the same restaurant.

Torres said Carlos and Blanca Zaragoza met there when he was a customer. She was from El Salvador and he was from Mexico, Torres said.

They moved to Canoga Park when Blanca Zaragoza got a job as a building manager.

Yvett Hernandez, 49, of Canoga Park was one of several people to visit the Zaragoza home Friday to provide comfort but found an empty home with a growing memorial.

"I have to pray for her," she said.

___

Associated Press writers John Antczak and Natalie Rice contributed to this report.

This undated photo released by the Los Angeles Police Department shows Gerry Dean Zaragoza. Authorities have arrested Zaragoza, accused of shooting multiple people, in two attacks early Thursday, July 25, 2019, in Los Angeles that officials say took the lives of two of his family members and an acquaintance, police said. (Los Angeles Police Department via AP)
Authorities work the scene at the intersection of Gault Street and Canoga Avenue, Thursday, July 25, 2019, in Canoga Park, Calif. A man fatally shot his father, brother and two other people Thursday during a 12-hour rampage across Los Angeles' sprawling San Fernando Valley, eluding a manhunt until he was arrested after gunning down a bus passenger, authorities said. (Dean Musgrove/The Orange County Register via AP)
Los Angeles Police Department crime investigators collect evidence at one of the scenes of a triple shooting, a Shell gas station in the North Hollywood section of Los Angeles, Thursday, July 25, 2019. (David Crane/The Orange County Register via AP)
Authorities work the scene at the intersection of Woodley Avenue and Victory Boulevard, Thursday, July 25, 2019, in Lake Balboa, Calif. A man fatally shot his father, brother and two other people Thursday during a 12-hour rampage across Los Angeles' sprawling San Fernando Valley, eluding a manhunt until he was arrested after gunning down a bus passenger, authorities said. (Dean Musgrove/The Orange County Register via AP)
Authorities work the scene at the intersection of Woodley Avenue and Victory Boulevard, Thursday, July 25, 2019, in Lake Balboa, Calif. A man fatally shot his father, brother and two other people Thursday during a 12-hour rampage across Los Angeles' sprawling San Fernando Valley, eluding a manhunt until he was arrested after gunning down a bus passenger, authorities said. (Dean Musgrove/The Orange County Register via AP)
This photo from video provided by KABC-TV shows Gerry Dean Zaragoza, 26, a suspect in a 12-hour rampage in Los Angeles' San Fernando Valley, being wheeled to an ambulance after his arrest Thursday afternoon, July 25, 2019. Zaragoza fatally shot his father, brother and two other people, then eluded an intense manhunt until plainclothes officers arrested him soon after he gunned down a city bus passenger, authorities said. (KABC-TV via AP)
This undated photo released by the Los Angeles Police Department shows Gerry Dean Zaragoza. Authorities have arrested Zaragoza, accused of shooting multiple people, in two attacks early Thursday, July 25, 2019, in Los Angeles that officials say took the lives of two of his family members and an acquaintance, police said. (Los Angeles Police Department via AP)
A LAPD officer talks to the victim of an attempted robbery in Los Angeles on Thursday, July 25, 2019. A gunman shot five people, killing three, in two attacks early Thursday in Los Angeles that police say took the lives of two of his family members and an acquaintance. A manhunt was underway for Gerry Dean Zarragoza, 26, who may be driving a blue Jeep Liberty with paper license plates, police spokesman Officer Drake Madison said. (David Crane/The Orange County Register via AP)
Los Angeles police officers guard an apartment where a shooting occurred in the Canoga Park area of Los Angeles on Thursday, July 25, 2019.  Police say a gunman shot five people, killing three, in two attacks in Los Angeles before he tried to rob someone outside a bank. (Dean Musgrove/The Orange County Register via AP)
A Los Angeles police officer stands outside of an apartment where a shooting occurred in the Canoga Park area of Los Angeles on Thursday, July 25, 2019.  Police say a gunman shot five people, killing three, in two attacks in Los Angeles before he tried to rob someone outside a bank. (Dean Musgrove/The Orange County Register via AP)
Investigators walk into an apartment where a shooting occurred in the Canoga Park area of Los Angeles on Thursday, July 25, 2019.  Police say a gunman shot five people, killing three, in two attacks in Los Angeles before he tried to rob someone outside a bank. (Dean Musgrove/The Orange County Register via AP)
LAPD crime investigators collect evidence at one of the scenes of a shooting, a Shell gas station in the North Hollywood section of Los Angeles on Thursday, July 25, 2019. A gunman shot five people, killing three, in two attacks early Thursday in Los Angeles that police say took the lives of two of his family members and an acquaintance. A manhunt was underway for Gerry Dean Zarragoza, 26, who may be driving a blue Jeep Liberty with paper license plates, police spokesman Officer Drake Madison said. (David Crane/The Orange County Register via AP)
A Los Angeles police officer walks out of an apartment where a shooting occurred in the Canoga Park area of Los Angeles on Thursday, July 25, 2019.  Police say a gunman shot five people, killing three, in two attacks in Los Angeles before he tried to rob someone outside a bank. (Dean Musgrove/The Orange County Register via AP)
Michael Ramia and Marisa Schetz place flowers at the apartment where their co-worker Carlos Zaragoza's family was shot in the Canoga Park section of Los Angeles on Friday, July 26, 2019. Police said Zaragoza killed his father and brother and wounded his mother at the apartment complex. (AP photo/Stefanie Dazio)