HOUSTON -- An accused serial rapist posted details about one of his attacks on the Internet, prosecutors told KPRC Local 2 Thursday.

Keith Chester Hill, 19, appeared in court on charges of aggravated kidnapping and aggravated sexual assault in a case from May.

Prosecutors revealed evidence that Hill posted a nude picture of one of his victims on MySpace.com. He also detailed how he followed the victim home, kidnapped him and made him withdraw money from several ATMs, according to authorities.

Police for months investigated five cases in which young white men were surprised at or near their homes by a black man with a gun demanding money. The investigation was complicated because profilers did not have a basic standard for investigating rare male-on-male rapes.

Hill was arrested late Tuesday after DNA obtained from him matched that taken from a victim in a May attack, police said.

Authorities said the man became a person of interest in the case before Christmas but the recent DNA results made him a suspect.

The attacks happened in the Baytown area or in Harris County, just southeast of Houston. The last reported attack was in November.