Very unlikely to ever be identified, but this is interesting if you're into historical UID cases. I was able to find a couple of newspaper articles about his discovery.
2389UMCA - Found May 13, 1915
DEMOGRAPHICS
Age: 40 - 60 years old
Race: Caucasian
Height: 5'11 - 6'2
Weight: 145 - 155 pounds
Postmortem Interval: 3 weeks (contemporary articles)
CIRCUMSTANCES
Location: Santa Ana riverbed 2 miles southwest of Colton, 1/4 mile from Rialto-Riverside Road, San Bernardino County, CA
Circumstances: A rancher rounding up his cattle found the body hanging from a tree along the Santa Ana River.
PHYSICAL/MEDICAL
Hair: Chestnut brown, balding. Dark brown or sandy mustache.
CLOTHING
Clothing found hanging on tree: Tan Ransom & Salsbee, San Antonio, Texas overcoat or raincoat, a gray Joske Bros. Co Department Store, San Antonio, Texas, and a shirt with collar and tie. No description of pants or shoes.
Coarse grey suit (according to newspaper article)
A hickory cane/walking stick
2389UMCA - Found May 13, 1915
DEMOGRAPHICS
Age: 40 - 60 years old
Race: Caucasian
Height: 5'11 - 6'2
Weight: 145 - 155 pounds
Postmortem Interval: 3 weeks (contemporary articles)
CIRCUMSTANCES
Location: Santa Ana riverbed 2 miles southwest of Colton, 1/4 mile from Rialto-Riverside Road, San Bernardino County, CA
Circumstances: A rancher rounding up his cattle found the body hanging from a tree along the Santa Ana River.
PHYSICAL/MEDICAL
Hair: Chestnut brown, balding. Dark brown or sandy mustache.
CLOTHING
Clothing found hanging on tree: Tan Ransom & Salsbee, San Antonio, Texas overcoat or raincoat, a gray Joske Bros. Co Department Store, San Antonio, Texas, and a shirt with collar and tie. No description of pants or shoes.
Coarse grey suit (according to newspaper article)
A hickory cane/walking stick