Prosecutors say surveillance video undercuts a self-defense claim in the Feb. 11 killing.
SAN FRANCISCO, CA — A parking lot security guard has been charged with murder in the fatal shooting of a man during a morning argument in San Francisco’s Tenderloin, after prosecutors said video shows the guard returned with a gun and shot the victim in the back as he tried to leave.
The case, announced Tuesday by District Attorney Brooke Jenkins, centers on a Feb. 11 shooting on Turk Street near Taylor Street. Police have not publicly identified the person killed. Prosecutors say the evidence does not support the guard’s claim that he fired in self-defense, and they plan to ask a judge to hold him without bail as the case moves to arraignment.
The defendant, Sefanaia Alatini, 37, of Oakland, was working security at a parking lot on the block when the confrontation started, authorities said. San Francisco police said officers responded at about 8:55 a.m. to the 100 block of Turk Street, where they found an adult male with a gunshot wound. Officers and paramedics tried lifesaving measures, including CPR, but the man died. Investigators detained a person of interest at the scene and later arrested Alatini.
Jenkins said security camera footage captured the moments leading up to the shooting and shows a sequence prosecutors say is critical. Alatini and the victim appeared to argue on or near the sidewalk outside the parking lot, she said. At one point, Jenkins said, Alatini left and then returned with a firearm. “At the point that the victim saw the defendant was holding a firearm, the victim pepper sprayed in the direction of the defendant before walking away,” Jenkins said at a news conference. “It was at that time that the defendant pointed the firearm at the victim, shooting him in the back.”
Court records described a calmer but deliberate progression. The footage, prosecutors said, shows Alatini approaching the victim and gesturing toward belongings on the sidewalk as the two talked. Alatini then stepped back into the lot and pulled a gun from a bag, according to the records. Prosecutors said he racked the gun and walked back toward the victim holding it in his hand. The victim then used a small bottle of pepper spray, turned away and started to leave, the records said. That is when, prosecutors allege, Alatini fired a shot into the victim’s back.
Prosecutors say the timing matters because pepper spray enters the scene only after the gun is displayed. Jenkins said the video shows the gun being brandished before the victim ever displayed or used pepper spray, and she argued that sequence undermines a self-defense claim. “What we did see is a brandishing of a firearm prior to the victim ever displaying pepper spray and or using that pepper spray,” she said. “So actually in that sense, it would support the victim having used some form of self-defense.”
Alatini is charged with murder, committing a crime with a gun and being a felon in possession of a gun, prosecutors said. Police said he was booked on suspicion of murder, felon in possession of a firearm and felon in possession of ammunition. The charging decision sets up a courtroom fight over what happened in the seconds between the pepper spray and the gunshot, and whether the defendant’s conduct before the spray should be considered when evaluating any claim of justification.
Little has been released about the victim, including his name, age, or where he lived. Jenkins’ office said Tuesday it was not providing information on the person killed. In the days after the shooting, police released only basic details about the time and place of the attack and the arrest. The lack of public identification has left neighbors and workers in the area with unanswered questions about what brought the two men together that morning.
The shooting happened in the Tenderloin, a dense neighborhood that includes residential hotels, social service providers, bars and storefront businesses. Turk Street near Taylor Street sits among busy blocks where pedestrians, delivery vehicles and street traffic mix throughout the day. The area has long been a focus of city debates over public safety, drug dealing, homelessness and the use of private security to supplement police presence.
Private security guards are a common sight around parking lots, retail corridors and some social service sites in San Francisco, often hired by operators or neighborhood groups to deter theft, break-ins and assaults. The Tenderloin also has organizations that provide street-level assistance and safety patrols, and residents frequently point to the steady hum of activity from early morning through late night. That mix can generate friction, especially when guards confront people about property, loitering, or behavior on sidewalks and in lots.
In this case, prosecutors have not publicly described what the two men were arguing about. Jenkins said there were indications from initial reports that the shooting started with an argument, but she declined to provide more. Court records summarized by local reporting indicate the interaction began with Alatini pointing toward items on the sidewalk and talking with the victim. It remains unclear whether either man knew the other, whether there had been earlier disputes, or whether the incident was connected to the parking lot’s operations that day.
Jenkins emphasized that camera footage will be central to the prosecution, both in establishing the sequence of events and in confronting any claims about perceived threats. She said the video’s clarity is part of a broader shift in modern criminal cases. “We are at a time now in society where surveillance videos are prevalent,” Jenkins said. “We have cameras all over the city, and thankfully they are of a quality that has been of great assistance to us.”
The camera evidence, prosecutors say, provides a real-time record that is difficult to square with an account that starts at the moment pepper spray is used. In many self-defense cases, the law turns on whether a person reasonably believed they faced imminent danger of death or great bodily injury. Prosecutors can also argue that a person who escalates a dispute by introducing a gun may lose the ability to claim self-defense if they provoked the confrontation or used excessive force. Those legal questions typically depend on careful review of video, witness statements, and any forensic evidence showing distance, trajectory and timing.
Police have not said whether investigators recovered the weapon at the scene, but prosecutors and police both allege Alatini possessed a gun despite being prohibited from having one. Police said he was booked for being a felon in possession of a firearm and ammunition. Prosecutors added a firearm enhancement and said they will seek to keep him in custody as the case proceeds. If a judge grants a request for detention without bail, Alatini would remain jailed while the case moves toward preliminary hearings and any trial date.
Officials also have not publicly said whether anyone else fired a weapon, whether there were additional injuries, or whether bystanders were put at risk. The shooting occurred during a busy time of day, and the block is lined with businesses and venues. People who live and work nearby have grown accustomed to police tape and patrol cars after incidents, but even in a neighborhood familiar with street violence, a broad daylight killing draws renewed scrutiny.
As news of the arrest spread last week, reports from the scene described a heavy police response and a body covered near the sidewalk. But investigators released few details as they built the case, and the district attorney’s office waited until Tuesday to outline what prosecutors say the video shows. That gap between the shooting and the charging announcement is typical in cases that hinge on footage review, witness interviews, and the collection of records needed to support charges in court.
The shooting has also drawn attention because it involves a security guard, a role that carries authority in a private setting but does not carry the same training standards as sworn law enforcement. In San Francisco, armed guards are used by some businesses and property operators, especially in high-theft areas. The presence of firearms in private security work can be controversial, with supporters arguing it deters crime and critics warning it increases the risk of lethal outcomes in disputes that might otherwise end without bloodshed.
On Tuesday, NBC Bay Area reported it reached out to the private security company that patrols the parking lot but did not receive a response. The station also contacted the Tenderloin Community Benefit District for comment and did not receive a response. Several trucks associated with the district were seen parked in the lot, according to that reporting. The district attorney’s office did not detail what role, if any, those groups had in employing Alatini or setting policies for the lot.
The criminal case now moves to arraignment, where Alatini is expected to hear the charges and enter a plea. Prosecutors said he is scheduled to be arraigned Wednesday. In the early stages of a homicide prosecution, judges may set conditions of release, issue protective orders, and schedule a preliminary hearing where prosecutors must show enough evidence to keep felony charges moving forward. Defense attorneys often use that hearing to test witness accounts, probe the reliability of video interpretations and look for inconsistencies in how events were recorded.
For prosecutors, the most immediate task is to secure the video evidence and any supporting materials so they can present a clear timeline to a judge and, later, to a jury. That often includes obtaining full-resolution footage, documenting how it was collected, and ensuring the chain of custody is airtight. Investigators may also seek additional angles from nearby cameras, including businesses, street poles or transit vehicles, to confirm what happened before and after the moments captured in the clip described by Jenkins.
For the defense, early questions may include whether pepper spray impaired Alatini’s vision, breathing, or judgment, and whether the video captures the full context of the confrontation. Lawyers may argue that the defendant felt threatened in a way not obvious on camera, or that the footage fails to show what was said between the men. The defense may also challenge the prosecution’s reading of the sequence, including how quickly the victim turned away and how much time passed before the gunshot.
Still, prosecutors indicated they believe the victim was the one trying to disengage at the end. Jenkins told reporters the victim used pepper spray only after seeing a gun and then attempted to walk away. In her telling, the shot came as the victim was retreating. That description, if supported by video and other evidence, could be a key hurdle for any self-defense argument because juries often view a shot to the back as evidence the victim was leaving, not advancing.
The case also arrives as San Francisco officials continue to debate strategies to curb violence in and around the Tenderloin. The neighborhood has seen periodic enforcement surges, street outreach efforts and changes in the way agencies coordinate responses. Prosecutors have increasingly leaned on video evidence in cases ranging from assaults to robberies, and Jenkins on Tuesday pointed to surveillance footage as a tool she says helps resolve factual disputes quickly.
In announcing the charge, Jenkins linked the case to a broader theme: the growing role of cameras in public life. In court, that can cut both ways, providing clarity while also raising questions about privacy and the uneven distribution of camera coverage across neighborhoods. But for investigators in this case, Jenkins said, the footage offers a direct view of the encounter and will help the prosecution present a detailed account of how the killing unfolded.
For now, authorities have not said whether additional charges could be added, whether there are other suspects, or what motive they believe drove the shooting. They also have not released the identity of the victim, a decision that sometimes reflects the pace of notification to family members or unresolved questions about next of kin. Police have said the investigation is ongoing, and prosecutors have said the case will proceed through regular court hearings starting with arraignment.
Author note: Last updated February 24, 2026.