Bakari Henderson's parents still seeking justice as suspects in son's 2017 killing face new trial in Greece

More than four years after Bakari Henderson was beaten to death by a mob in Greece, his parents are returning to that country for a retrial of their son's murder case.

The 22-year-old American was on a business trip in July 2017 when he was attacked outside a bar in an incident that was captured on camera. Nine of the attackers went on trial in 2018. Six were found guilty of assault, and none were convicted of murder.

His parents, Jill and Phil Henderson, sat down with "CBS Mornings" co-host Gayle King to discuss their fight for justice for the young man they called the heartbeat of their family.