19-year-old Christina Becker and her 17-year-old sister Jaqueline were driving Mr. Caiafa's van to buy milk when they were hit by trooper Robert Higbee's cruiser.
Caiafa says he came upon the scene and spotted the van.
At first, he said police told him it wasn't his granddaughters.
Caesar would find out the dreadful truth four hours later alongside the girls' mother Maria Caiafa at nearby church.
"At about 2:00 in the morning, one of the police lieutenants came over and said the van was registered to you. That's how we knew the kids were dead," Caesar said.
The accident happened in September 2006. Trooper Higbee was chasing a speeder. His car hit the Becker girls' van at Stagecoach and Tuckahoe Roads in Marmora with such force that the van was found 200 feet from the intersection.
Higbee is charged with vehicular homicide. Maria Caiafa cried as her father detailed the horrible night her daughters died.
He broke down while looking at a photo of the accident scene.
The Cape May County jury also heard from Karen Giblin who lives near the intersection.
She testified that she heard a speeding car, then the crash.
She ran outside and called 911.
The trial, expected to take several weeks, will resume on Monday.
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