A 47-year-old man was discovered dead with blunt force trauma wounds to his head and chest inside Interfaith Medical Center's psychiatric ward on Tuesday March 19, 2013. View Full Caption DNAinfo/Michael Phillis

BEDFORD-STUYVESANT — Tuesday night in Interfaith Medical Center's psychiatric ward began with a friendly game of dominoes between two patients but ended with one player lying dead on a shower floor and the other standing over him, officials said.

An aide found the 47-year-old victim, identified as Conrad Delimar, about 9:54 p.m. with blunt force trauma wounds to his head and chest and charged Spence Andrews, 20, with murder, said NYPD and Interfaith officials.

The two men showed no signs of animosity during the dominoes game nor when they headed to the shower as part of their nightly routine, an Interfaith spokeswoman said.

Other patients noticed that the two were taking longer than usual in the shower and an aide who went to check on them discovered Delimar lying on the floor and Andrews standing over him, the spokeswoman said.

Delimar was pronounced dead at the scene, police said.

Sources said Delimar asked Andrews to perform oral sex on him, and then Andrews lashed out.

Unlike other parts of the ward, the incident took place in an area without any cameras, and the aide said they didn't hear any kind of argument between the two patients prior to finding the body, the spokeswoman said.

"There was a patient that was not injured and there was a patient that was injured," the hospital spokeswoman said. "We don’t know if that person fell or if that person had cardiac arrest or if it was a beating."

Police said Andrews was taken into police custody at Interfaith and brought to Kings County Hospital Center.

Michael Phillis contributed reporting.