The shooting happened on South Westward Street early Friday morning.
Donna Parker, 38, told investigators she shot Luther Figgs, 45, three times after he refused to let her leave the Bad Fish, a 32-foot sailboat the two had lived aboard, police allege.
A falling light pole damaged five vehicles on the causeway on Monday. Officials have ruled out crashes, weather, faulty bolts and construction as potential causes.
The woman had been reported missing almost a week ago, police said. Her relatives on social media said her car had been found days before the body was discovered.
A truck driver was taken to the hospital to be treated for minor injuries, police said. The accident could cause delays for people driving north from Galveston.
Eric Alzafari was sentenced to two years in prison after being convicted of sexual assault and sexual contact with a supervised person