Question: What was the age of the person who committed the famous shooting in the Retreat at Twin Lakes gated community?

Context paragraphs:
Twin Lakes (Fort Lauderdale): Twin Lakes was a census-designated place (CDP) in Broward County, Florida, United States, which was divided into Twin Lakes North and Twin Lakes South.  The population was 1,875 at the 2000 census.

Shooting of Trayvon Martin: On the night of February 26, 2012, in Sanford, Florida, United States, George Zimmerman fatally shot Trayvon Martin, a 17-year-old African American high school student.  Zimmerman, a 28-year-old mixed race Hispanic man, was the neighborhood watch coordinator for his gated community where Martin was visiting his relatives at the time of the shooting.  Zimmerman shot Martin, who was unarmed, during an altercation between the two.

Interlaken Resort District: Interlaken Resort District is located near Twin Lakes, Colorado and was one of the most scenic and most popular resort areas in the mountains of Colorado, in the United States.  Located across from the town of Twin Lakes, it began operations in 1879 as a small and unpretentious hotel called the Lakeside Resort on the smaller of the two lakes at the foot of Mt. Elbert.  In the 1950s the Twin Lakes were enlarged and Interlaken was cut off from the town and only accessible by boat.  The hotel closed shortly after the lake was enlarged.

Lake Otis (Florida): Lake Otis is a natural freshwater lake located on the east side of Winter Haven, Florida.  The Polk County Water Atlas says the lake sometimes is known as Little Otis, but this is confirmed nowhere else.  The main part of the lake is somewhat rectangular in shape and on the south side of the main section of the lake is a long tail-shaped cove.  Lake Otis has a 144 acre surface.  It is connected on its northeast side to nearby Lake Link by a 50 ft canal.  This is the closest point between the two lakes.  Other than where the shore where the two lakes are very close, Lake Otis is completely surrounded by residences.  Lakewood Causeway runs between the two lakes.  To the south of this area is a gated community that can be accessed by the public during the daytime.  Most of the south cove is surrounded by another gated community and the public is prevented from entering it by gates that are closed all the time.

Twin Lakes (Madison County, Montana): Twin Lakes are a pair of small sub-alpine lakes in the Axolotl Lakes group in the Greenhorn Range southwest of Ennis, Montana.  Lower Twin Lakes is approximately 11 acre .  Upper Twin Lakes is considerably smaller and located approximately .25 mi southwest of the lower lake.  Twin Lakes is located on state owned land and accessible by a one-lane dirt road (Axolotl Lakes Road) connecting Montana Highway 287 and the Gravelly Range road.

Twin Lakes Secondary School: Twin Lakes Secondary School is a secondary school located in Orillia, Ontario.  In March, 2008, a review process began to consolidate Orillia's three public high schools into two buildings as a result of cost of maintenance of the aging buildings and the declining enrollment at Park Street Collegiate Institute.  As of 2013, Twin Lakes is now one of the two remaining public high schools.  Twin Lakes administrative staff include Principal Julie Underhill and vice principals Jaclyn Calder and Mark Harvey.

Twin Lakes Beach, Manitoba: Twin Lakes Beach (French: Plage Twin Lakes), also known locally by many as simply "Twin Beaches," is a beach / community located in the Canadian province of Manitoba, on Lake Manitoba.  It is about 100 km north-west of the provincial capital Winnipeg.  Twin Lakes Beach is located in both the Rural Municipality of St. Laurent (French: la Municipalité Rurale de Saint-Laurent) and the Rural Municipality of Woodlands, and is near the town of St. Laurent.

The Retreat at Twin Lakes: The Retreat at Twin Lakes is a gated community in the US city of Sanford, Florida that gained notoriety following the February 2012 shooting of Trayvon Martin by George Zimmerman.  The community initially consisted of 1,400-square-foot (130 m²) townhouses which sold on average for $250,000, but had values below $100,000 by February 2012 due in large part to the financial crisis of 2007–2008.  In 2013, properties ranged from "$115,990s–$126,990s."

Bradbury, California: Bradbury is a city in the San Gabriel Valley region of Los Angeles County, California, United States.  It is located in the foothills of the San Gabriel Mountains below Angeles National Forest.  Bradbury is bordered by the city of Monrovia to the west and south, and Duarte to the south and east.  The population was 1,048 at the 2010 census, up from 855 at the 2000 census.  The city has three distinct areas—the Bradbury Estates, which is a gated community consisting of 5 acre minimum estates; Woodlyn Lane, which is also a gated community with minimum 2 acre lots; and the balance of the city, which is not gated, which has lots generally ranging in size from 7500 sqft to 1 acre .  A significant portion of the properties in Bradbury Estates and Woodlyn Lane are zoned for horses, and several horse ranches still exist within these communities today.

Twin Lakes (Lake Wales, Florida): The Twin Lakes of Lake Wales, Florida, are two small natural freshwater lakes on the south side of the city.  Sometimes they are simply called Twin Lakes, but sometimes they are individually called Twin Lake West and Twin Lake East.  All shores of Twin Lake West are swampy, as is the area between the two lakes.  The west shore of Twin Lake East is swampy.  The west lake, the larger of the two, has a water area of 18.76 acre .  The water area of the east lake is 15.19 acre .

Supporting paragraphs: The Retreat at Twin Lakes Shooting of Trayvon Martin
Answer: 28-year-old