PITTSBURGH — A medical examiner has issued a homicide ruling in the death of a University of Pittsburgh Medical Center internist stabbed during an argument with his daughter, who is facing a homicide charge.

Police and paramedics in Allegheny County were called to a Plum Borough home shortly after 3 a.m. Saturday and found 69-year-old Anthony Nicassio stabbed. The Allegheny County medical examiner’s office said Sunday that he died of stab wounds to the chest, and the manner of death was ruled homicide.

Police said the victim and his wife were trying to take 27-year-old Christina Nicassio to a hospital when the stabbing occurred. Police allege that she told investigators that he “had to die.” She is charged with homicide and possessing an instrument of crime.

Police say Christina Nicassio told them, “In a movie, someone who can’t love someone else, they stab their father” — saying that’s what she took from the “Mummy” film.

[naviga:h3]Police to investigate officer after arrest[/naviga:h3]

PITTSBURGH — Police are promising an internal investigation after a man tweeted video of an officer kneeing and kicking a man in the head during an arrest.

Witness Damian Trott tweeted the 10-second video after the arrest of 26-year-old Nathan Stanley III.

Police say Stanley threatened to shoot up a South Side bar, then tried to choke an officer who responded about 2 a.m. Sunday.

Police acknowledge hitting Stanley before taking him down and the officer allegedly choked, Raymond Toomey, acknowledges in court records that he kneed and kicked Stanley in the head. Police say that was done because Stanley’s hands were beneath him and police feared he was reaching for a weapon as they tried to handcuff him. Police didn’t find a weapon.

Stanley doesn’t have an attorney listed in court records showing him facing aggravated assault and other crimes.

[naviga:h3]No dismissal in cookout ambush[/naviga:h3]

PITTSBURGH — A judge has denied defense motions to dismiss murder charges against two men in an ambush at a Western Pennsylvania cookout that killed five adults and an unborn child.

Allegheny County prosecutors have said they plan to seek capital punishment if 29-year-old Cheron Shelton and 27-year-old Robert Thomas are convicted of first-degree murder in the March 2016 shootings in Wilkinsburg.

Police allege that Thomas opened fire on one side of the backyard, forcing the family to run to the other side, where authorities allege that Shelton began firing with an assault rifle.

Defense attorney Casey White argued Friday that no eyewitnesses have identified Thomas and prosecutors lack DNA and ballistics evidence.

Judge David Cashman denied the motions.