Two police officers will be laid to rest today after two separate but equally as tragic incidents last weekend. Nassau County Police Officer Geoffrey Breitkopf will be laid to rest in Selden, Long Island this afternoon and NYPD Officer Alain Schaberger's funeral is in East Islip.

Schaberger was engaged to be married when he died Sunday morning.

It all started when a frightened woman called 911 and said her ex-boyfriend threatened to kill her. Instead, George Villaneueva, a career criminal with a history of slapping and punching the woman allegedly killed Schaberger.

Cops had him in cuffs when Villanueva allegedly shoved the 10-year veteran of the force. Police say the 42-year-old fell over a railing, plummeting 9 feet, landing on his head in a stairwell. He died later that morning at the hospital.

Schaberger was a Navy veteran and highly regarded in the police force.

In this case, Villanueva had been accused in a dozen reports of domestic violence by the woman who called 911 on Sunday. She apparently obtained two orders of protection against Villanueva.

Nassau County Police will also lay to rest Officer Geoffrey Breitkopf, shot to death Saturday in a tragic case of mistaken identity.

He was shot when an MTA cop mistakenly fired at him during a bizarre call for a man with knife in Massapequa Park. He leaves behind a wife and two young sons.

No charges have been filed in the case - just controversy, and sadness.

Now, the police union is looking at a retired NYPD Sergeant who allegedly yelled the word "gun" and may have sparked the shooting.

Both made the ultimate sacrifice.

Shaberger is the first city officer to die in the line of duty since May 2009, when plainclothes officer Omar J. Edwards was mistakenly shot in Harlem by another police officer.

Breitkopf is the second Nassau cop killed in the line of duty in the last few months. 44-year-old officer Michael Califano was killed when a truck driver fell asleep and slammed into his parked patrol car.