David Thomas, a rock and roll musician from Texas, has been missing for four days and has not been seen since.
He has not left his Texas home since Sunday night.
Thomas, whose full name is David Thomas Smith, was last seen walking on the banks of the Gulf of Mexico in Fort Worth, Texas.
His family is asking anyone who may know where he is to contact authorities.
The family says Thomas is 6-foot-4, has short brown hair and blue eyes.
The rocker’s brother, David Thomas Jr., said he is a musician and is on tour.
“I would like to thank the entire Rockwell and Rockwell Jr. family for their prayers and support throughout the search,” he said.
“We know that if you have any information on where David is, please call the police.”
Thomas is described as black, about 6 feet tall and weighs 150 pounds.
He was last reported wearing a black shirt, black pants, black shoes and a black jacket with white trim.
He also has a brown hair band around his neck.
Authorities said they believe Thomas is armed and dangerous.
“The investigation into his whereabouts is ongoing, and we are asking anyone with information to call the Texas Department of Public Safety at (940) 986-2121 or the Texas Rangers at 1-800-TIP-RPS,” the agency said in a statement.
Thomas was last heard from on Monday, the day he was reported missing.
Authorities are asking people to call them with information on Thomas’ whereabouts.
Thomas’ brother, Dave Thomas Jr, said he was on a tour bus in Texas with his family and that he has no way of contacting them.
“He has not done anything,” he told Fox News.
“No phone calls, no emails, nothing.
And if they do hear from him, they’re going to call me and I’m not going to answer.”