https://www.texasattorneygeneral.gov/sites/default/files/images/admin/2021/Press/Cold Case Missing Person Unit Press Packet - NEW (10.25.21).pdf
Also from the OAG statement, p 3:
ITEMS OF EVIDENTIARY INTEREST
11/24/16 - Dodge Durango belonging to THOMAS BROWN found
Soil sample taken from apparent wet spot near driver’s side of
vehicle
Testing by the University of North Texas yielded no results
.25 caliber casing found on floorboard of front passenger side.
Casing did not provide any forensic evidence. No latent prints could be identified on the casing and casing could not be tested further for DNA per DPS lab.
01/27/17 - Backpack belonging to THOMAS BROWN found containing his school-issued laptop.
Nothing of forensic value found on laptop.
10/14/17 - iPhone belonging to THOMAS BROWN found on (see additional information on iPhone below).
10/14/17 Gun case found.
Forensic testing by DPS-no profile could be obtained from hair
samples found on the case
Records produced from Apple, Inc. indicate that THOMAS
BROWN’S iCloud account did not contain data that is commonly backed up such as iMessages and photographs. It is of interest because IP logs and data access logs were blank.
Records from Facebook indicate THOMAS BROWN’S Facebook page had been removed. Per a representative from Facebook, removing a Facebook account can only be done with the account owner’s password.
January to February 2019 - Skeletal remains positively identified as THOMAS BROWN located in.
Partial skeletal remains were discovered on January 9, 2019, by
PYNE GREGORY, former Hemphill County Deputy, at
approximately 9:45 a.m. while he was on duty.
Other remains, though not all remains, discovered in OAG
search on February 12, 2019.