Texas Search and Rescue crews kicked off the search for Jason Landry at the request of the Caldwell County Sheriff's Office.
"We have K9's, mounted (equine) SAR Team members, drones, a helicopter, and dedicated ground search and rescue teams pushing through day three of this search," organization officials said in a Facebook post on Sunday. "We are exhausting every resource and giving everything we have today."
The 21-year-old student from Missouri City went missing on Dec. 13, 2020. He was on his way home, but his Nissan Altima was found crashed and abandoned outside of Luling, Texas.
READ MORE: Father of missing Texas State student says search is still on: 'We're hopeful'
Luling is approximately 30 minutes away from the school in San Marcos and 140 miles west of Houston.
His wallet, phone and keys were found inside the car. Clothing was found approximately 900 feet from the crash, according to the sheriff's office.
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"How are we getting through it? We're being prayed for," said the student's father, Kent Landry, during an interview in December.
The search organization otherwise known as TEXSAR said its initial operation included nine days of ground search and three days of aerial search spanning with more than 100 trained volunteers.
"TEXSAR has continued to be involved throughout the investigation, smaller follow up searches, and now this upcoming large scale deployment," said the nonprofit group in a statement on Thursday.
The Caldwell County Sheriff's Office released a photo of Landry in January, though the investigation remains ongoing.
"They're just doing everything diligently to keep the search going and using every effort to find Jason," said a CCSO spokesperson on Thursday. "At the moment we cannot discuss any further information at this time. An update will be released upon the completion of the scheduled search activities."
If you know anything about Landry's whereabouts, call 911 or the Caldwell County Sheriff's Office at 512-398-6777 or email Detective Jeff Ferry at firstname.lastname@example.org.