A former Missouri police officer, once convicted for the murder of a Central Kentucky student, is back on trail.
Police say he killed Boyle County native Jesse Valencia in 2004.
The original conviction for Steven Rios was overturned because of problems with testimony.
The appeals court says Rios received an unfair trial because the prosecution used two hearsay comments by the victim as part of their case.
According to court officials, Jesse Valencia's mother, Linda, is in court watching the second trial for her son's killer.
Stephen Rios, the former Columbia, Missouri police officer, was convicted of killing the 23-year-old.
The Kentucky native was a junior at the University of Missouri at the time. Police say someone found Valencia with a slashed throat near his apartment building.
Investigators say Valencia had a personal relationship with Rios, who was married at the time.
Rios was found guilty and sentenced to life without parole. The verdict was overturned more than a year ago.
The trial is expected to last at least a week.