Police search for apparent serial killer tied to 5 murders

Five unprovoked murders in the past several months appear to be the work of one person, according to the Stockton, California, Police Department.

Authorities are searching for a person of interest tied to the five slayings, the first of which occurred on July 8. All of the victims were men and all were alone at the time they were fatally shot, police said.

The killings all happened at night or in the early morning hours.

Police released only a few details about the string of murders and when they happened: a 35-year-old man fatally shot at 12:31 a.m. on July 8; a 43-year-old man fatally shot at 9:49 p.m. on Aug. 11; a 21-year-old man fatally shot at 6:41 a.m. on Aug. 30; a 52-year-old man fatally shot at 4:27 a.m. on Sept. 21; and a 54-year-old man fatally shot at 1:53 a.m. on Sept. 27.

Stockton police told ABC News that all of the victims were ambushed, none were robbed and none were drug- or gang-related. Police also told ABC News that they have physical evidence linking the five crime scenes together.

None of the victims were publicly identified by police, but the family of the most recent victim identified him as Lorenzo Lopez, according to Sacramento ABC affiliate KXTV.

"He was just a person who was out here at the wrong place at the wrong time at the wrong circumstance," his brother Jerry Lopez told KXTV. "It's hard to process that this has happened. I mean, me and my brother have been like twins. We were a year a part so we were pretty close."

Another victim's mother, Greta Bogrow, confirmed to ABC News that her son, Paul Alexander Yaw, 35, was killed on July 8, 2022, on the 5600 block of Kermit Lane.

"He was a good boy who grew into a good man with a big heart. He will always live on in our hearts. He was always there for you if you needed him," the family said in a statement provided to ABC News. "He was a son, brother, father, grandson, nephew and cousin. I still can't believe he's not coming back. I hope this helps to catch the person(s) responsible."

The city of Stockton said it was putting forward a $75,000 reward for information leading to an arrest in the investigation. Stockton Crime Stoppers is posting an additional $10,000 reward.

The day after Lopez's killing, Stockton police had said at a press conference they were not sure if the string of killings were related.

"[We're] still looking at it from a random point of view, but we do see some similarities," Police Chief Stanley McFadden said Wednesday. "We have been provided absolutely zero evidence that leads us to believe that one individual is running rampant in the city of Stockton killing people."

But that changed two days later when the department tied the five killings together and released an image of a person of interest.

ABC News' Caroline Guthrie and Lisa Sivertsen contributed to this report.