"It’s very likely that it was targeted — we just don’t know why," Fresno Police Deputy Chief Michael Reed told reporters.
Authorities were also seeking to file charges against the student, police said.
"I did not feel courageous. I was simply doing my duty as a citizen," Blasey Ford told the ACLU of Southern California.
Court documents allege that John Chapman of Pennsylvania tied Jaime Feden to a sign post in Nevada, put tape over her face and left her to die.
The victim was airlifted to a hospital and reported to be in "serious but stable condition."