Dennis Schulte, 66, and Judy Schulte, 68, were killed in the cross-walk accident Monday. Karina Ulriksen-Schulte, 33, and her 12-day-old son Elias were hospitalized in critical condition, KIRO-TV in Seattle reported.
The Schultes were retired teachers from Kokomo, Ind., who had traveled west to help care for their grandchild, The (Louisville, Ky.) Courier-Journal reported.
Mark Mullan, 50, the accused driver, was driving his pickup truck on a suspended license, KIRO-TV reported.
Lacia Bailey, a witness who said she spoke with the victims seconds before they crossed the street, said they stopped to see Bailey's pet baby goat.
"I saw the truck at a high rate of speed hit the people in the intersection. They were all lying there, motionless," Bailey said.
Mullan's blood-alcohol level was 0.22 at the time of the incident, almost three times the legal limit, police said.
Court records show Mullan has a history of drunken driving arrests.
Prosecutors Tuesday asked for Mullan's bond to be set at $2 million. The judge set it at $2.5 million in light of Mullan's previous record, the TV station reported.
It was expected Mullan will be charged with vehicular homicide and assault, the TV station said.
Notable deaths of 2014 [PHOTOS]