Police have arrested the father of a missing pregnant woman after they found her body in the basement of the Bronx home they shared. Friends and family members reported Andrea Caruth, 39, missing on Monday after she disappeared the day prior from the Baychester home she shared with her boyfriend and her father William Caruth, 61. Caruth, a day care operator who was five months pregnant, was supposed to meet a friend for brunch that morning, but vanished, leaving behind her coat, keys, and phone.

Police searched the house once, but found no sign of her. They came back on Tuesday with dogs, and early Wednesday morning, discovered her body in a basement crawl-space, partially covered in rubble and stuffed into what reports describe as a hollowed-out section of concrete. ABC7 reported:

Sources said that she had been at her house that morning when she went down to the basement to change a light.

While doing this, authorities believe her father, who lives in the basement, started some sort of argument with her — killing her soon after, sources said.

Sources tell ABC 7 that they believe William Caruth strangled his daughter and beat her in the head with a hammer. The Medical Examiner's Office ruled that her death was caused by strangulation and blunt impacts to her head that fractured her skull and injured her brain.

Police told the New York Post that the two were having a dispute over money. An unidentified friend told NBC4 that Andrea Caruth was "a strong-headed girl," and that though she was grown up, her father was "very controlling man, a very stern, firm man." A police spokesman said he could not confirm a motive, or that the body was found near where the elder Caruth slept.

Police also questioned her boyfriend, but released him on Wednesday. Friends, neighbors, and family members mourned Caruth at a vigil outside the 47th Precinct station house on Wednesday night.

William Caruth is facing charges of second-degree murder and manslaughter. Information about who his attorney is was not immediately available.

A woman who sent her daughter to Andrea Caruth's daycare told the New York Post she couldn't grasp what had happened.

"She was just starting life," Sydney Jones said. "That’s the beginning of your life, when you’re having a child. And to know that she was just killed over — what? It doesn’t make any sense."