Prosecutors said a festering neighborhood dispute over construction noise turned into a deadly confrontation.
Prosecutor Joseph McGettigan told the Delaware County Court jury that Dellavecchia had purchased the gun he used to kill Robins only months before and that he hid in the predawn light waiting for Robins to emerge from his home to kill him.
Robins' coworker at a fire-sprinkler installation company, Rick Wallace, testified that the two would meet at Robins' house and leave for work. That morning, he was early and sat in the van waiting. Robins opened the driver's side door and then Wallace heard a noise.
"I can still see the muzzle flashes," he testified.
Wallace slid under the van and watched as someone wearing white sneakers and jeans moved from around the driver's side to the back of the vehicle. Wallace then got up and ran for blocks.
Snow never met Dellavecchia before he allegedly shot her. She was busy working three jobs and only went home to "shower and sleep."
As she lay critically wounded with Dellavecchia standing above her, the two just stared at each other, saying nothing, until he walked away, she said.
Snow said she could hear her stepfather's moans and see his blood running down the driveway.
From the chaos that followed the shooting, Snow remembered something more - a police officer asking her father who shot him.
" 'Dellavecchia did it,' " Snow said she heard Robins tell police. "Those were the last words I heard from him."
Testimony continues Wednesday before Common Pleas Court Judge Michael F.X. Coll.
Contact Mari A. Schaefer at 610-892-9149, firstname.lastname@example.org or @MariSchaefer on Twitter.