Huntsville police have an assault case on their hands.
Officers arrived on Clopton Street in southwest Huntsville just before 6:00 a.m.
Inside a vacant apartment they found a woman with a serious head injury.
Huntsville police say they believe the woman is a prostitute - and an argument over money landed her in the hospital.
Neighbors watched as police camped out outside Apartment 186 to try to find answers.
Police have identified a suspect but have not released the man's name.
A police investigator made his way to the hospital to talk with the victim this morning.