COUPEVILLE, Wash. (AP) _ The mother of a 5-year-old girl who drowned when her father's car rolled down a boat ramp said Friday that the man should suffer his entire life for his negligence.

Breanna Ashley Sharon Eagle drowned and her 3-year-old half-brother, Edwin Crisp Jr., was seriously injured when their car plunged into the Strait of Juan de Fuca early Thursday.

Their father, Edwin Crisp, and his common-law wife, the boy's mother, had taken the children to the boat launch to see the lights over the saltwater strait.

They told investigators they put the aging Datsun into neutral because the reverse gear didn't work, and that it rolled away from them when they got out to push it up the ramp.

``He knew that car had no reverse on it. Why would you take babies to a beach at a boat ramp where something could happen at one in the morning?'' said the girl's maternal grandmother, Valerie Eagle.

Crisp, 33, of Vancouver, British Columbia, was being held in Island County Jail Friday for investigation of manslaughter as authorities awaited the results of alcohol and blood tests.

The boy remained in serious condition Friday at Children's Hospital and Medical Center in Seattle.

His common-law wife was not identified and has not been charged.

Tammie Eagle, of Burnaby, British Columbia, told KOMO-TV of Seattle that she wanted Crisp held responsible for Breanna's death.

``He should suffer for the rest of his life, and he's not going to get away with it,'' Eagle said.

Public defender Craig Platt said it was an unfortunate accident.

``Our client made valiant and repeated attempts to rescue his children without success. It took several emergency personnel some time to remove the children from the vehicle,'' Platt said.