That photo appeared in the October 14, 1957 issue of LIFE magazine. So what's happened to the two since?
I found this article on PEOPLE's website:
January 13, 1975 Vol. 3 No. 1
A Famous Cop Takes Over in Washington
In 1957, although they did not know it at the moment, a 25-year-old Washington cop and a 2-year-old toddler were about to become famous. During a Chinese festival, officer Maurice Cullinane stooped down to coax tiny Allen Weaver back onto the curb to avoid the sputtering fireworks. The picture, widely reprinted, earned photographer Bill Beall a Pulitzer Prize.
Last month, Cullinane's attention to the little details of police work paid off again. Known as "Wonder Boy" for his rapid rise within the department, the 20-year veteran was named the city's chief of police. It was a popular appointment. Despite local pressures for a black chief—70 percent of the city's residents and more than one third of its police force are black—"Cully" was the easy favorite in a recent rank-and-file vote to replace retiring chief Jerry Wilson. Although the vote was not binding on Mayor Walter Washington, it was a measure of confidence that Cullinane welcomed. (As for little Allen, he is now 19, and his family has moved to California.)
Cully is a third-generation Irish cop. "I've never wanted to be anything else," he says. "It's a family tradition." His father walked a Washington beat for 34 years, and his grandfather and several granduncles also wore the shield. Long a believer in the value of the foot patrolman, Cullinane's first act as chief was to order his legion of motorscooter cops to start hoofing it half the time. "People in the community," says Cully, "don't feel the police understand their problems if they're driving around all the time."
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I also found out that he's now retired and living in the Washington D.C. aread.
I also found this article:
http://www.sptimes.com/2003/07/29/Floridian/Healthline.shtml
Maurice Cullinane of Maryland was cruising for a good fishing spot near the tip of Anna Maria Island with two friends. The boat hit a wave, and the anchor flipped and lodged in the back of Cullinane's skull. The anchor was removed after seven hours of surgery at Bayfront Medical Center, according to St. Petersburg Times files.
Ouch!
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Police Transcript from the Night Lincoln was Shot
WASHINGTON, DC - DC Metropolitan Police kept meticulous notes about the details about what it was like for police at the scene of President Abraham Lincoln's murder on April 14th 1865.
An unknown police officer wrote a detailed description of the assassination in a log book. FOX 5's Paul Wagner reported on this back in January of 2008.
At that time parts of the not were hard to decipher. But not the complete transcript has been released. Former Police Chief Maurice Cullinane donated the log book to the DC Police Museum.
The transcript can be found here:
http://www.myfoxtwincities.com/dpp/news/021209_Police_Transcript_Night_Lincoln_was_Shot2149365
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There's LOTS that can be found online about Maurice Cullinane. Being chief of police, he's frequently mentioned in news articles.