A 19-year-old seeking adventure by hopping freight trains and riding the rails was killed by three transients who were also riding illegally on the trains, Roseville, Calif., police said.
Detectives last week announced they had arrested three train hoppers -- two men and a woman -- in connection with the March 2013 killing of John Paul Alpert of Palmdale.
Alpert attended community college and left his family to go on a "first-time adventure" by hopping aboard trains and riding the rails across California, police said.
He had checked in with his family every day until he was killed, the Sacramento Bee reported.
Last week, police arrested Laura Lee Kenner, 30, in New Mexico and Jules Clifford Carrillo, 21, and Edward Taylor Anauo, 23, in Nebraska in connection with the slaying.
Alpert's remains were found two months after he lost contact with his family near the railyard in Roseville, outside Sacramento.
The three are being held without bail and await extradition.