Hospital Front

Family of Chicago Hospital Shooting Victim Files Suit Against Security Company, Hospital

The lawsuit argues that Mercy Hospital and SDI Security did not follow their own protocols by failing to issue alerts or initiating a lockdown of the building.

A security company and hospital in Chicago are facing a wrongful death lawsuit from the family of a woman killed in a 2018 shooting.

The 12-count suit accuses Mercy Hospital, SDI Security Inc and Trinity Health Inc of negligence that would have saved the life of Dayna Less, a pharmacy resident, who was killed when she stepped out of a hospital elevator on Nov. 19, 2018. The suit also names the estate of the shooter, who was killed during a gun battle with police.

Two others died during the shooting: emergency room doctor Tamara O’Neal, who was the ex-fiancee of the gunman, and Chicago Police Officer Samuel Jimenez, who was killed in the shootout shootout.

Less’ family claims that the hospital and the security company did not follow their own protocols while responding to the shooting. SDI and Mercy failed to issue a “Code Silver” alert for an active shooter that would have led to a lockdown of the building, The Chicago Sun-Times reported.

That alert would have warned Less and her colleagues about the threat, the lawsuit contends, and prevented the gunman from re-entering the hospital after he shot O’Neal in the parking lot.

In addition, the suit accuses hospital and security officials of not confronting the gunman between the time he arrived in the hospital lobby at 1:45 p.m. and when he confronted O’Neal in the parking lot at 3:12 p.m.

“Mercy and SDI literally watched this armed and dangerous man hunt down and kill Dr. O’Neal, then shoot at the police when they arrived, and then stop and reload his weapon. Yet they did nothing,” Matthew Piers, an attorney for the Less family, told the Sun-Times. “Amazingly, they continued to do nothing as [the gunman] walked back into the still unlocked hospital building.”

In response to the suit, Mercy Hospital officials extended their sympathy to the Less family but said they do not comment on pending litigation. SDI Security filed a contribution lawsuit last month arguing that the city of Chicago and the police departments had failed to confront the shooter or prevent him from re-entering the hospital. This makes them partially liable for any damages related to the tragedy, according to SDI.

The company denied any liability for injuries caused by the shooting but said the city should have to contribute to payment if a judgement is rendered against SDI, according to the Sun-Times.

About the Author

Haley Samsel is an Associate Content Editor for the Infrastructure Solutions Group at 1105 Media.

Featured

  • Improve Incident Response With Intelligent Cloud Video Surveillance

    Video surveillance is a vital part of business security, helping institutions protect against everyday threats for increased employee, customer, and student safety. However, many outdated surveillance solutions lack the ability to offer immediate insights into critical incidents. This slows down investigations and limits how effectively teams can respond to situations, creating greater risks for the organization. Read Now

  • Security Today Announces 2025 CyberSecured Award Winners

    Security Today is pleased to announce the 2025 CyberSecured Awards winners. Sixteen companies are being recognized this year for their network products and other cybersecurity initiatives that secure our world today. Read Now

  • Empowering and Securing a Mobile Workforce

    What happens when technology lets you work anywhere – but exposes you to security threats everywhere? This is the reality of modern work. No longer tethered to desks, work happens everywhere – in the office, from home, on the road, and in countless locations in between. Read Now

  • TSA Introduces New $45 Fee Option for Travelers Without REAL ID Starting February 1

    The Transportation Security Administration (TSA) announced today that it will refer all passengers who do not present an acceptable form of ID and still want to fly an option to pay a $45 fee to use a modernized alternative identity verification system, TSA Confirm.ID, to establish identity at security checkpoints beginning on February 1, 2026. Read Now

  • The Evolution of IP Camera Intelligence

    As the 30th anniversary of the IP camera approaches in 2026, it is worth reflecting on how far we have come. The first network camera, launched in 1996, delivered one frame every 17 seconds—not impressive by today’s standards, but groundbreaking at the time. It did something that no analog system could: transmit video over a standard IP network. Read Now

New Products

  • 4K Video Decoder

    3xLOGIC’s VH-DECODER-4K is perfect for use in organizations of all sizes in diverse vertical sectors such as retail, leisure and hospitality, education and commercial premises.

  • PE80 Series

    PE80 Series by SARGENT / ED4000/PED5000 Series by Corbin Russwin

    ASSA ABLOY, a global leader in access solutions, has announced the launch of two next generation exit devices from long-standing leaders in the premium exit device market: the PE80 Series by SARGENT and the PED4000/PED5000 Series by Corbin Russwin. These new exit devices boast industry-first features that are specifically designed to provide enhanced safety, security and convenience, setting new standards for exit solutions. The SARGENT PE80 and Corbin Russwin PED4000/PED5000 Series exit devices are engineered to meet the ever-evolving needs of modern buildings. Featuring the high strength, security and durability that ASSA ABLOY is known for, the new exit devices deliver several innovative, industry-first features in addition to elegant design finishes for every opening.

  • FEP GameChanger

    FEP GameChanger

    Paige Datacom Solutions Introduces Important and Innovative Cabling Products GameChanger Cable, a proven and patented solution that significantly exceeds the reach of traditional category cable will now have a FEP/FEP construction.