Missing Houston Man, 71, Found Safe After 11-Week Search, Silver Alert Lifted

Louis Mackey, the 71-year-old Houston man who vanished from Downtown Houston in June, has been found safe, bringing a close to a Silver Alert that stretched on for more than two months. Mackey was last seen walking in the 700 block of N. San Jacinto Street on June 11, wearing a black t-shirt and blue jeans, before his family reported him missing to the Houston Police Department.

The update came Tuesday from TX Center 4 Missing, which posted that “Louis Mackey was located safe. The Silver Alert is cancelled. Thank you for sharing.” The Texas Center for the Missing had issued the Silver Alert on behalf of the Houston Police Department after Mackey went missing, and the nonprofit says it is dedicated to “bringing hope and healing to missing people and their families.”

Mackey's last known location placed him near the University of Houston-Downtown and major light rail lines along Buffalo Bayou, a busy transit corridor in the city's urban core, according to HTX Media. Anyone with information had been asked to contact the Houston Police Department at 832-394-1840, though with Mackey now located, that tip line is no longer needed for his case.

How Texas Decides When to Issue a Silver Alert

Getting a Silver Alert activated isn't automatic. Under Texas Government Code § 411.382 and Department of Public Safety rules updated in 2020, issuing one requires documented medical proof of an impaired mental condition that poses a health threat, confirmation that other explanations for the disappearance have been ruled out, and submission by law enforcement within 72 hours, according to the Texas Department of Public Safety. The Houston Regional Silver Alert System, established in October 2014, is administered by the Texas Center for the Missing and covers a 14-county area that includes Harris, Fort Bend, Galveston, Montgomery, and Brazoria counties.

The scale of missing-person cases across the state helps explain why that infrastructure exists. Texas law enforcement agencies logged 40,309 missing-person reports in 2025, including 12,080 involving adults over 18, according to state clearinghouse data compiled by the Texas Center for the Missing. In Harris County alone, agencies received 10,524 new missing-person reports in 2020, spanning missing children, runaways, and vulnerable adults with cognitive impairments, per the Harris County Sheriff's Office.

Why Wandering Poses Such a Serious Risk

Medical research underscores why alerts like Mackey's move quickly once approved. Roughly 6 in 10 people living with dementia will wander away from safety at least once during their condition's progression, according to the Alzheimer's Association. That risk is part of why Texas also created a separate CLEAR Alert system in 2019 for missing adults ages 18 to 64 who are in imminent danger but don't meet Silver Alert or AMBER Alert criteria, per the Texas Department of Public Safety.

The Texas Center for the Missing, founded in 2000 by Doreen Wise following the disappearance and death of her son Gabriel Lester, provides 24/7 alert activation, law enforcement training, and family support, according to the Houston Chronicle. Mackey's case is the latest in a string of Houston-area Silver Alerts resolved this month. On August 12, Houston Police and the Texas Center for the Missing located 78-year-old Robert Wise safe after he wandered on foot near Bellefontaine Street, and days later a Silver Alert was issued for a missing 68-year-old woman last seen walking in Alief. Each case underscores the same pattern: regional alert networks built to move fast when an elderly or memory-impaired resident disappears on foot.