TreeStone Security Services
05/23/2026
Yesterday at approximately 1650 hours, while conducting a routine patrol at a property currently serviced by our company, Captain W. Mills was making contact with several homeless individuals in a stairwell near the leasing office. Captain Mills made contact with two repeat offenders and detained one suspect in handcuffs for criminal trespassing while preparing to contact law enforcement.
The second repeat offender, identified as Geraldo Valencia, refused to comply with verbal commands to come down the stairs and leave the property. Geraldo Valencia then suddenly fled on foot. Captain Mills did not pursue the suspect as he ran from the area.
Captain Mills observed Geraldo Valencia running eastbound on the second-floor walkway. Moments later, a loud banging noise was heard followed by a person screaming. Shortly afterward, Captain Mills observed the suspect running back toward him with a large laceration on his right forearm. Captain Mills immediately noticed that the suspect was bleeding heavily, with blood actively squirting from the wound.
Based on observations made on scene, the suspect appeared to have attempted to jump from the second-floor walkway in an effort to clear the wrought iron perimeter gate. The suspect did not successfully clear the gate and instead impaled his right forearm on a pointed hook attached to the perimeter fence, causing the severe laceration.
Captain Mills immediately radioed dispatch requesting emergency medical assistance and advised that 911 was needed immediately. He then applied a tourniquet above the wound on the suspect’s right upper arm in an attempt to control the bleeding. The tourniquet was tightened, secured, and marked with an application time of 1700 hours. The suspect was instructed to remain seated while awaiting the arrival of medical personnel.
At approximately 1710 hours, Captain Mills observed the bleeding beginning to increase again. He tightened the tourniquet further in order to fully restrict circulation to the injured area. The bleeding was successfully controlled after the adjustment.
Emergency medical personnel arrived on scene at approximately 1715 hours. Medical personnel advised that the prompt application of the tourniquet likely prevented the suspect from losing a significant amount of blood. The suspect was subsequently transported to the hospital for further medical treatment.
03/29/2026
Good afternoon Arizona clients and residents,
At Treestone Security Services, we are constantly implementing new and innovative ways to showcase the hard work and dedication our team delivers every single day. From armed patrol units and unarmed standing posts to armed on-site officers, dispatch, and our supervisory team — every division plays a critical role in providing elite security services.
Together, we continue to grow and strengthen our presence, steadily expanding across Tucson, Arizona through consistent, reliable, and effective service.
Moving forward, we will be sharing a monthly activity report highlighting the work our team performs each day. This transparency reflects our commitment to accountability, performance, and the high standards we uphold for every client we serve — and those we look forward to serving in the future.
Thank you for your continued trust in Treestone Security Services.
Good afternoon Arizona clients and residents,
We would like to give a big thank you to Tucson Crime Free for taking the time to interview our team following the recent shooting incident. We chose to work with your platform to help share what truly happened and bring awareness to the situation.
Our goal was never fame or recognition. Our purpose is to shed light on the security industry and the work that many dedicated officers and companies do every single day to protect the communities they serve.
At Treestone Security Services, we take pride in going above and beyond for every client and every property we are trusted to protect. While security professionals don’t always receive recognition from the news or even local law enforcement, we remain committed to doing our job to the best of our ability and keeping our communities safe.
Thank you to our clients and residents for continuing to trust us to serve and protect your properties.
03/01/2026
Good morning, Arizona residence and clients,
As many of you may know, Lieutenant Michael Gomez was previously an employee here at Treestone Security Services. Security can be an excellent stepping stone toward advancing a career in law enforcement or the military, and Michael is a great example of that path.
As of yesterday, I was informed that Michael has officially graduated and advanced in his military career. This is a major accomplishment, and we are proud to see one of our former team members continue to grow and succeed.
On behalf of Treestone Security Services, I want to personally congratulate him and wish him continued success in his military career and future endeavors.
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2008 E Broadway Boulevard Unit 300
Tucson, AZ
85719