Bowling Green police said Thursday morning there are no suspects in the murder of 51-year-old math professor Martha “Bettina” Richmond.

Monday is the one-year anniversary of Richmond’s death, said Barry Pruitt, public information officer for the Bowling Green Police Department.

The police department has been doing daily investigations since the murder, he said.

Pruitt said extensive interviews have been done in the past two weeks regarding the case, and that this week, 21 items from the van found at the scene of the crime were submitted as pieces of evidence.

Today, members of the media were allowed to view the van in which Richmond’s body was found.

Police found Richmond dead in her vehicle, which was parked in the Bowling Green Parks and Recreation parking lot on Nov. 22, 2009.

Pruitt said the van has been submitted three times as evidence for the case.

He urged anyone with information about the case to call Bowling Green police or Crime Stoppers for anonymous tips.

Check tomorrow’s Herald for more coverage on this story.