Sims-Lewis said that each year, police officials expect a few extraordinary events. Last year saw marches for and against Proposition 8, a Metrolink crash and a few immigration protests, among other things. But "if we have something huge like an earthquake or a flood and a string of incidents, that could devastate us," she said.
In the case of a large-scale disaster, some expenditures could be reimbursed by the federal government.
Sims-Lewis said that last year, the LAPD did not use all of its allotted 1.6 million hours of overtime -- in part because about 100,000 hours -- or $6.7 million -- was returned midyear after Mayor Antonio Villaraigosa asked city departments to tighten their belts.
Perry said city officials don't know the public cost of the Jackson memorial but are using last month's Lakers championship parade -- which cost $2 million and was ultimately covered by private contributors -- as one benchmark. Nearly half of the money was for public works and law enforcement, the largest deployment of LAPD forces in approximately a decade.
At the news conference, Perry asked for donations to help pay the city's non-law enforcement costs. "The city would deeply appreciate" the help, said Perry, who was acting as mayor since Villaraigosa was in South Africa and City Council President Eric Garcetti was in Japan.
Tim Leiweke, president and chief executive of AEG, the company that owns and operates Staples Center and that was producing Jackson's comeback concerts in London, said the service will be carried live on television and the Internet. Further details about the service were still being discussed, he said.
Jackson family publicist Ken Sunshine said the event and the distribution of tickets are being orchestrated with the fans in mind.
"Everything about the memorial has to do with the fans," Sunshine said.
Late Friday, AEG announced that the random drawing, originally limited to U.S. residents, had been expanded to those living in other countries.
Staples Center, site of Jackson's last rehearsal, can hold as many as 20,000 people, depending on its configuration.
Organizers plan to select 8,750 names at random from the list of people who register on the Staples Center website; those selected will be notified between 11 a.m. and 8 p.m. Sunday and told where to go on Monday to pick up two tickets and wristbands guaranteeing them seats at the event. Of the 17,500 tickets available, 11,000 are for the Staples Center and 6,500 are for Nokia Theatre, across the street, where the service will be shown on a jumbo screen.
The rest of the available tickets will be given to "family, and friends of the family, for their use," Sunshine said.
Both Leiweke and Sunshine said they do not want anyone to try to scalp tickets.
"We're hoping people have dignity," Leiweke said. ". . . Those who would take advantage of this, shame on them."
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cara.dimassa@latimes.com
richard.winton@latimes.com
david.zahniser@latimes.com
Times staff writer Andrew Blankstein contributed to this report.