A wedding party floating peacefully aboard Pittsburgh's Gateway Clipper riverboat suddenly turned rocky early Monday when the groom got himself into hot water with a female member of the clipper fleet.

KDKA-TV in Pittsburgh is reporting that the woman who works for the Gateway Clipper told police that groom Mark Williams, 33, was being "touchy feely" with her. This, while she was working.

She also reportedly told her boyfriend that the groom had attempted to "pour alcohol down her throat," even though she told him she was pregnant, KDKA writes.

The woman called her boyfriend, Tyler Smith, 20, during the wedding so he could come pick her up at the Gateway Clipper docks in Station Square.

It was then and there that the brawl allegedly broke out.

KDKA reports that Smith allegedly confronted Williams about his actions and the physical altercation began.

Police say Williams' brother, off-duty Pa. State Trooper David Williams, 35, eventually got involved and became aggressive with police, KDKA writes.

A fourth man, Brian Taylor, 31, punched his hand through the front passenger window of a car nearby. He was taken to UPMC Mercy Hospital for treatment.

Sources told KDKA that Brian Taylor is a member of the Stowe Rocks School Board. A police report states that when Taylor was taken into custody, he yelled that he was HIV positive, as he tried to resist arrest, the station wrote.

Arrested in the fracas were Mark Williams, David Williams and Taylor.

KDKA reports that David Williams is a Pennsylvania State Police trooper, off-duty at the time of the early Monday incident. He is facing charges of aggravated assault, resisting arrest and obstructing law enforcement, along with an internal investigation, KDKA writes.

"He ignores various commands from police to stay back," said Pittsburgh Police Spokesperson Sonya Toler said of the Trooper. "He ends up getting arrested."

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