LITTLE ROCK — The Arkansas State Police said Friday its investigators were prepared to work non-stop to find the person or persons responsible for the killing of an Arkadelphia man and his two young stepdaughters.

Bobby Jean Galbraith, 40, Adiele Crutchfield, 6, and Marley Crutchfield, 4, were dead when officers arrived at their home on South 11th Street after receiving a call at 8:10 p.m. Thursday, state police said. A 6-month-old girl said to be the biological daughter of Galbraith and his wife, Anna, was found alive and unharmed in the home.

Anna Galbraith reported that she found her husband dead when she arrived home Thursday night, according to state police.

State police did not immediately release details about the conditions in which the bodies were found but said homicide was suspected.

"At this time we know there is either a killer or killers who are being sought," said Arkansas State Police spokesman Bill Sadler.

Sadler would not say whether police found signs of forced entry to the home.

The victims’ bodies were taken to the state Crime Lab in Little Rock for autopsies.

Anyone who has information about the case is asked to contact local police or state police.