California man with 'compulsion' to murder tries to turn himself in TWICE...stunned officers reveal possible serial killer confessed after being shooed away by other deputies

Read the original at Daily Mail ↗
Daily Mail · collected 2026-09-26 · by Victor Heller

Quick Summary

Marcelino Castro, 28, of California, confessed to murdering two people at different times by luring them with methamphetamine offers, then strangling or striking them. He initially tried to turn himself in twice: once at Main County Jail in San Jose where he was not believed, and again successfully at the San Jose Police Headquarters. Castro led officers to the locations along the Guadalupe River bed where the bodies were found; the area is frequented by homeless individuals experiencing frequent violence. Deputy District Attorney Michael Gadeberg described Castro’s case as unique due to a lack of apparent motive, suggesting a compulsion to kill.
Written locally by qwen2.5:14b on 2026-09-26, using this article's own text rather than the other coverage of the same event (that is the story summary below).

AI analysis runs on qwen2.5:14b, locally

Story summary

Marcelino Castro, 28, from San Jose, was charged with two counts of murder after confessing to killing two men and leading police to their bodies buried along the Guadalupe River. Deputy Santa Clara County District Attorney Michael Gadeberg warned that these killings might be part of a serial killer case due to Castro’s behavior pattern. Castro initially flagged down an officer on September 19, guiding them to one victim's body near Lelong Street and West Alma Avenue; he then confessed to a second killing the same day. Prosecutors noted Castro tried twice to turn himself in, first at Main County Jail where deputies did not believe him, later successfully confessing at San Jose Police Headquarters on September 19. Authorities are concerned about possible additional victims given Castro's apparent lack of motive and methodical approach in luring victims under the pretense of smoking methamphetamine together.

Written for “Possible Serial Killer Suspect” on 2026-10-05, grounded in this article and the 1 other(s) covering the same event.

Signals How these are calculated →

Claims extracted
20
claim-shaped sentences
Uncertain
25%
5 of 20 hedged
Leaning
not political
takes no side on a contested political question
Correction & hedging signals
64.9
corrections and hedging in what we collected; not a measure of accuracy
Outlets on this story
2
Crime & Law
Narrative spread
1
articles carrying this framing
Analyzed 2026-09-26 · how these are computed

Story

📰 Possible Serial Killer Suspect
Crime & Law · 2 article(s) covering the same event. See how they differ ↓

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Compared with similar articles

This article reads unscored and hedges 25% of its claims. Each row says how that neighbour differs.
The Independent
⚖️ leaning not scored 🔴 45% hedged 10 of 22 📰 publisher trust 59
“Both articles describe Marcelino Castro confessing to two murders and leading police to the bodies, indicating they are reporting on the same specific incident.”

Publisher

Daily Mail · 3681 article(s) · 12 correction(s) detected
Running correction rate · 12 correction(s)
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Clarifications and corrections

Who wrote this

Victor Heller
43 article(s) here · 1 carrying a prediction
🔮 Maybe he should come over here and sweep the pavement.'
🔮 Pfleghardt explained he could sense discomfort even beyond the trip.
🔮 According to the filing, non-Christian and Muslim groups will not have to operate under the same restrictions.
🔮 The brave real-life Lassie searched for help after his owner fell and could not get up anymore The dog stopped and barked at a police officer, who then followed the loyal companion to his owner's house Another dog appeared at the home as well, where the resident had been for more than three hours, police said The officer then spotted the resident, who has not been identified. 'Thanks to the resident's loyal companion, our officer was able to find them and get them the help they needed,' police said.
🔮 San Joaquin County Sheriff Patrick Withrow said investigators gave the widow their word: 'that we will not let this go by without finding these individuals.'
🔮 Susan Shea, 58, was charged after her neighbor filmed her dragging a pitchfork outside and shouting that she would haunt their nightmares.
🔮 McKinsey filed for a restraining order in December 2025, a week before his wife's temporary order was set to expire.
🔮 Seattle's socialist mayor was dealt yet another public humiliation as damning texts between a fellow Democratic lawmaker and the Washington governor about her performance during a July mass shooting were leaked.
🔮 So far, they've planted some trees, thinking that would solve the issue.'
🔮 'We couldn't get ahead of the media's propaganda and lies,' she lamented. 'He didn't do it.
Also by Victor Heller
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 43 articles by Victor Heller →

Topics

California Daily Mail San Jose the Santa Clara County District Attorney's Office the Unhoused Response Group

Subjects

Castro PERSON · 12× California GPE · 2× Cartwright PERSON · 2× Marcelino Castro PERSON · 2× Michael Gadeberg PERSON · 2× San Jose GPE · 2× Daily Mail ORG · 1× Shaunn Cartwright PERSON · 1× the Santa Clara County District Attorney's Office ORG · 1× the Unhoused Response Group ORG · 1×

Narrative

Deputy District Attorney Michael Gadeberg said: 'I've never seen a case like this, where there's just no apparent motive. 'Where someone just has this compulsion to kill, starts with a friend or someone they knew, and then moves on to a total stranger.' The area along Guadalupe River where the victims were murdered is known to be frequented by people experiencing homelessness.
framing: mixed · carried by 1 article(s) · first seen 2026-09-26
🔮 Cartwright added that there was a third recent death that could be connected to Castro.

Claims (20 extracted, 5 hedged)

- See more Daily Mail on Google - save us as a Preferred Source A California man shocked a room full of police officers when he walked into a police station and confessed to killing two people – for the second time. Marcelino Castro, 28, was arrested on Saturday after he confessed to murdering two people on two different days. According to the Santa Clara County District Attorney's Office, the first killing took place on September 13 and involved a friend of Castro's. uncertain
killing → see → Castro
Only a few days later, Castro allegedly murdered another person, who this time was unknown to the killer. uncertain
who → murder → killer
A statement of facts declaration from a police detective said Castro's friend had been strangled and his throat slit, while the stranger had been strangled and struck with a rock. asserted
stranger → say → rock
In both cases, Castro lured the victims by offering to smoke methamphetamine with them, police said. asserted
police → lure → them
Prosecutors added that Castro tried to turn himself in at the Main County Jail in San Jose but that the deputies there did not believe him. asserted
deputies → add → him
Afterwards, Castro went to the San Jose Police Headquarters where he confessed to the crimes again, according to prosecutors. uncertain
he → go → prosecutors
Marcelino Castro, 28, turned himself in after reportedly murdering his friend and a stranger in California Castro reportedly first tried to turn himself in at the Main County Jail in San Jose but the deputies there did not believe him which is why he had to go to the San Jose Police Headquarters The 28-year-old allegedly lured his victims by suggesting to smoke methamphetamine with them, police said He reportedly also led officers to the locations where the victim's bodies were found, along the Guadalupe River bed. uncertain
bodies → turn → bed
Deputy District Attorney Michael Gadeberg said: 'I've never seen a case like this, where there's just no apparent motive. 'Where someone just has this compulsion to kill, starts with a friend or someone they knew, and then moves on to a total stranger.' The area along Guadalupe River where the victims were murdered is known to be frequented by people experiencing homelessness. asserted
victims → say → homelessness
Shaunn Cartwright from the Unhoused Response Group told KTVU: 'There is a lot of violence that happens to unhoused people.' asserted
that → tell → people
The bodies of Castro's victims were found along the Guatalupe River bed The area is known to be frequented by people experiencing homelessness, locals said Deputy District Attorney Michael Gadeberg said he has 'never seen a case like this' asserted
he → find → this
Cartwright added that there was a third recent death that could be connected to Castro. uncertain
that → add → Castro
It was the same day that the man turned himself in,' Cartwright said. asserted
Cartwright → turn → himself
'They were found in the morning. asserted
They → find → morning
It's just that there was a third body that was found on the same day.' asserted
that → be → day
Castro missed his first scheduled arraignment on Wednesday, when he did not show up in court. asserted
he → miss → court
He did appoint a lawyer on Wednesday and came into his rescheduled court hearing on Thursday but did not make any statements to the court. asserted
He → appoint → court
While the victims have not been identified, a woman who was at Castro's hearing claimed she was the mother of one of the victims. asserted
she → identify → victims
She did not want to be approached for comment, however. asserted
She → want → comment
Castro remains in jail without bail until his next court appearance, scheduled for December 8. asserted
Castro → remain → December
Prosecutors said they can not rule out the possibility of more victims. asserted
they → say → victims
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