Mr McMichael's companion in Downing Street was John White, convicted of a brutal double murder.
Dorner is a suspect in a double murder Sunday in Irvine, California, authorities said.
One of them, police said, was 36-year-old Benjamin Hudon-Barbeau who had beaten a double murder conviction on an appeal.
Simpson is acquitted of the 1994 double murder of his estranged wife Nicole Brown Simpson, and her friend Ronald Goldman.
Hudon-Barbeau was cleared on appeal of a double murder, but returned to prison in connection with an attempted murder investigation, the spokesman said.
Police find Miss O'Callaghan's body and search for a second possible victim after arresting a 47-year-old man on suspicion of double murder and kidnap.
If the consequence of Tuesday's double murder is a display of militaristic toughness, the troubled inner-city estates may become even more difficult to police.
Sam Rocket, 22, who had close links with the UVF, was shot dead at his girlfriend's house on the following Wednesday night in reprisal for their double murder.
Simpson double murder trial ended its rebuttal case on Monday.
Despite U.S. claims of diplomatic immunity because of Davis' employment at the U.S. consulate in Lahore, he landed in jail, charged with a double murder and illegal weapons possession.
Now Essex County Council's social services department has revealed the last contact social workers had with the family was in 2011, weeks before the double murder on 6 June.
Simpson juror Brenda Moran explained why the panel of nine blacks, two whites and one Hispanic returned a not guilty verdict in less than four hours Monday after a double murder trial that lasted nearly nine months.
Hours after authorities identified Mr. Dorner as a suspect in the double murder, police believe Mr. Dorner shot and grazed an LAPD officer in Corona and then used a rifle to ambush two Riverside police officers early Thursday, killing one and wounding the other.
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Simpson's double-murder trial was the topic of conversation.
But even Panama has seen its murder rate double in the past four years.
The case has led to the government announcing plans to scrap the double jeopardy rule in murder cases.
He welcomed the call to allow second trials but said it was "irrational" to confine the change in the double jeopardy rule to just murder trials.
They filed a similar double set of attempted-murder charges.
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Within a year, it had been used in a Leicestershire double-rape-and-murder case, to prove one man could not have committed the crimes and to confirm another had.
The grounds for making murder a unique exception to the double-jeopardy principle are shaky.
But he was not jailed for her murder because as the law of double jeopardy stands, Dunlop could not be tried twice for the killing.
Investigators believe the deaths came from either a "murder-suicide" or a "double suicide, " he said.
And in February it suspended its contract with Oscar Pistorius, the double amputee runner from South Africa charged with premeditated murder in the Valentine's Day killing of his girlfriend.
They apply to 30 serious crimes - including murder, rape, Class A drug offences and war crimes - but double jeopardy remains in force for lesser offences.
Oscar Pistorius, the double-amputee sprinter known as the "Blade Runner, " is charged with premeditated murder in the death of his girlfriend, model Reeva Steenkamp.
Pistorius, a double-amputee and Olympian sprinter who competes with prosthetic legs, is charged with premeditated murder, accused of deliberately shooting his model girlfriend in his home on February 14.
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