The teenage son of a pregnant Texas woman was charged on Monday with first-degree murder in her death.

Nita Moseley, 33, was found dead by a neighbor in her La Marque home on Saturday, according to KHOU. Her 14-year-old son was later questioned by police and has been described as “cooperative in the investigation,” the Houston Chronicle reported.

No cause of death or motive has been released and the suspect has not yet been named.

“She did any and everything for her son,” a neighbor told KHOU. “They got along great. Her son was a good student.”

Cops confirmed to the Houston Chronicle that Moseley was pregnant at the time of her death, and a friend told KHOU that Moseley was four months into the pregnancy.

The neighbor that found Moseley, apparently dead for several days when she was found, checked on her after he saw the front door to her house open.

“Saturday morning when I drive by, and I saw the door open, that’s when I figured something was wrong,” the man told Click2Houston. “I thought maybe someone had broken in the house or something, and that’s when I found the unfortunate event that happened.”

Moseley’s son was reported missing after her body was found and a 2014 black Nissan Maxima was reported stolen. Cops located the boy and the car in Houston on Sunday, according to the Chronicle.

La Marque is about 50 miles south of Houston.