Rebecca Jean Sewell, known as Becky, was 35 when she vanished from Tucson, Arizona. She was last seen on June 1, 2000, in the area of the 100 block of 5th Avenue and was never heard from again. Rebecca was described as a white female with brown hair and brown eyes, between 5 feet 4 inches and 5 feet 6 inches tall, weighing 125 to 135 pounds, and having several tattoos. She had a medical condition that required medication, which increased concern for her welfare after she disappeared.

The Tucson Police Department lists her as an endangered missing person and continues to investigate. Few concrete leads have emerged and the circumstances of her disappearance remain unclear. If anyone knew Rebecca, saw her around June 1, 2000, or has information that could help, please share what you know with investigators.