A black York Region officer shook his head in disgust and said nothing when someone in a mob of drunken partygoers shouted he would like to see him lynched, a police disciplinary hearing has heard.

Const. Jeffrey Lasseter testified on Wednesday that he and his partner, Const. Dameian Muirhead, “looked at each other” when the insult was hurled at Muirhead.

“I remember him shaking his head and we left the property,” Lasseter said.

The officers were called to investigate an assault at a bush party in May 2011 on an Aurora farm.

Muirhead, 33, faces three misconduct charges, including one for not investigating the racial taunts made against him. He has yet to testify.

The hearing before Supt. Robertson Rouse of York Regional Police adjourned Wednesday with no return date in sight, after hearing two days of prosecution witnesses.

Lasseter testified that Muirhead made an effort to de-escalate tensions until backup officers arrived.

He had glowing praise for Muirhead’s professionalism, including his work on the day in question.

“(He’s) very professional on duty, caring. . . . He’s low key. Quiet. I like Dameian a lot.”

Muirhead, an eight-year police veteran, faces charges of insubordination and discreditable conduct after a man alleged he was rudely treated at the party.

He is also charged with neglect of duty for allegedly failing “to properly investigate” the racial remark.

The confrontation came after Muirhead, Lasseter and a third officer were dispatched to investigate an incident where a woman was seriously injured when her boyfriend ran over her with an off-road vehicle at the party.

The woman was treated in hospital for a shoulder injury, the hearing was told

Making the formal complaint against Muirhead was Rheal Duguay, 41, who runs a landscaping and engine-repair business in Aurora.

Duguay said he was offended because Muirhead wouldn’t talk with him as the officer checked the licence plates of vehicles at the farm.

Things got particularly ugly when Duguay’s $400 leather jacket fell from his motorcycle to the ground and Muirhead ignored his repeated orders to “Pick up my (expletive) jacket!”

Lasseter praised Muirhead for not talking with Duguay and escalating the already tense situation, which he said had the potential of becoming violent.

In earlier testimony, Duguay’s 21-year-old nephew, Christopher Duguay, said he heard talk of one of the partygoers making racist taunts.

“The guy saying it was usually a drunken idiot,” Christopher Duguay testified.

Christopher and Rheal Duguay both said they were not drinking at the party.

Christopher Duguay said he saw partygoers drinking “a lot but not enough when they’re going to be doing dumb stuff; killing themselves or crashing into things.”

He said it didn’t surprise him to hear one partygoer ran over his girlfriend with an all-terrain vehicle. “He just does dumb stuff.”

Some of Duguay’s complaint stems from a chance encounter between himself and Muirhead on May 24, 2011, at an Aurora gas station.

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Duguay admitted telling Muirhead he would “kick his ass” if he didn’t have a police badge and gun.

He said Muirhead called him a “loser” and gave him an incorrect police badge number.

Duguay was charged with uttering a threat. He received a discharge on condition he take a one-day anger management course.