Ivan Aguilar, the 35-year-old suspect in the December murder of a man at a hotel near downtown, told San Antonio police he was driven to kill by news that the victim had given him a sexually transmitted disease.

The revelation is made in an arrest warrant affidavit.

Aguilar was arrested on that murder warrant Monday night.

According to that document, detectives said Aguilar confessed to killing Vincent Diaz, 42, whom he met at a bar.

Diaz was found Dec. 23 inside a room at a hotel in the 1000 block of S. Laredo Street.

Police said he was nude, laying on a bed with his hands bound together with cloth, and that he had been strangled.

They also said that some of his property, including designer luggage and jewelry, were missing.

The affidavit stated that surveillance cameras at the hotel captured images of Diaz leaving in a taxi early that morning, then returning later with a man.

The same cameras also captured images of that other leaving the hotel later with the victim’s property.

After the discovery of Diaz’s body, detectives contacted the taxi company and learned the location of the bar that Diaz had visited, the affidavit stated.

They said witnesses at the bar then gave them information leading them to Aguilar.

According to the affidavit, Aguilar later confessed to the murder, but said he killed Diaz after learning his own life might be in jeopardy.

He told detectives that, after a sexual encounter with Diaz in the hotel room, Diaz told him he had given him a potentially deadly disease, the affidavit stated.

Aguilar said the news upset him, causing him to strangle Diaz, the affidavit stated.

It stated that he said he acted “on instinct” when he stole the victim’s property.

Aguilar was booked into the Bexar County jail on a charge of murder with bond set at $250,000.

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