DALLAS (CBSDFW.COM) – Dallas Police are investigating a homicide inside a home in the 2600 block of Belknap Avenue, south of Illinois, east of S. Lancaster Road.

Police were called to check on the people inside the South Dallas home. When officers showed up around 11:40 a.m., they found the bodies of a man and woman inside.

Police are not saying how they might have been killed.

Police aren’t giving many details about what happened, but a cousin of one of the victims tells CBS 11 a woman in her 50s and her adult son in his 30s were killed by her live-in boyfriend of five years.

The cousin, Pamela Williams, said police are looking for him now.

A neighbor told CBS 11 she heard four gunshots early this morning, but when she came outside, didn’t see any suspicious activity.

Williams said the woman’s co-workers became concerned this morning when she didn’t show up for work.

They came to her house and when no one came to the door, they called police.

Williams said she spoke with her earlier this week and said her boyfriend was very controlling.

“When I talked to her two days ago, and she was talking real, real strange and I said why haven’t you called me and she was talking real, real strange, well you have the wrong number and she hung up,” said Williams. “I knew something was wrong.”

Williams said she called back, but the woman didn’t answer the phone.

Williams said the woman’s son leaves behind three young sons, ages 2, 3 and 6, and that she was planning to visit her daughter and grandchildren in Ohio for Christmas.

Police are asking the public to call them if they have any other information.