Investigation Discovery is set to premiere an episode of the true crime show “People Magazine Investigates” on Monday, Jan. 14 about the York race riots of 1969.

The episode is called “Murder on Newberry St.” and will air at 10 p.m. The show features a mix of archival photos and video, reenactments and interviews. Editors from People magazine appear on camera and help provide narration.

READ:York's race riots were a war that left dozens injured and 2 people dead

York City Police Officer Henry Schaad was shot and mortally wounded while inside an armored vehicle on July 18, 1969. He was white. Then, three days later, Lillie Belle Allen, a black woman from Aiken, South Carolina, in town visiting family was shot and killed.

No arrests were made in the killings. Thirty years later, York’s newspapers ran stories about the unsolved murders. The York County District Attorney’s Office, York City Police Department and Pennsylvania State Police reopened the investigation, which resulted in the conviction of a dozen people.

Then-York Mayor Charlie Robertson was charged with first- and second-degree murder in Allen’s death. He admitted that he yelled “white power” at a rally in Farquhar Park but denied allegations that he had handed out ammunition to gang members and incited violence. He was found not guilty at trial.

RELATED:York race riots of 1969: Timeline of the criminal cases

People interviewed in the episode include: Bill Graff, a former chief deputy prosecutor who led the prosecution in the Schaad case; Tom Kelley, a former first assistant district attorney who led the prosecution in the Allen case; and William Costopoulos, Robertson’s attorney.

Members of Schaad’s and Allen’s families are also interviewed.

ALSO OF INTEREST:50 years ago, a black U.S. marine returned home to find York a cauldron of racial tension

Investigation Discovery is Channel 899, or 111, or 1444 on Comcast depending on your zip code; Channel 285 on DirecTV; and Channel 192 on Dish Network.

Contact Dylan Segelbaum at 717-771-2102.

Description of the episode: ‘Murder on Newberry St.’

The following is the description of the episode from Investigation Discovery:

In July 1969, racial tensions between the black and white communities escalated into riots in York, Pennsylvania. The city spiraled out of control and in the end, two people were killed amidst the chaos: Henry Schaad, a white police officer; and Lillie Belle Allen, a young black woman and mother of two. But any investigation into the slayings stalls completely when witnesses refused to cooperate and the city declines to continue pursuing the case in the interest of preserving the peace. But 30 years later, new witnesses come forward, tying a powerful figure to the crimes… the current mayor of York.

Also of interest, this photo gallery about the York race riots of 1968 and 1969: