It was dark and raining and with a sweatshirt with a hood on I doubt if Zimmerman could determine his race or age.<quoted text> He was black,with a hoodie on.
Eating skittles and drinking tea.
The reasons he had to be suspicious are indicated in the article below.
The Retreat at Twin Lakes is a 260-unit gated townhome community in Sanford, Florida. The population in the development at the time of the shooting, was about 49% non-Hispanic white, 23% Hispanic(of any race), 20% black, and 5% Asian, according to Census figures. Both George Zimmerman and Tracy Martin's fiancee were renting homes in the development when the shooting occurred. At the time of the shooting, Martin had been staying with his father's fiancee at The Retreat.
From January 1, 2011 through February 26, 2012, police were called to The Retreat at Twin Lakes 402 times. During the 18 months preceding the February 26 shooting, Zimmerman called the non-emergency police line seven times. On five of those calls, Zimmerman reported suspicious looking men in the area, but never offered the men's race without first being asked by the dispatcher. Crimes committed at The Retreat in the year prior to Martin's death included eight burglaries, nine thefts, and one shooting. Twin Lakes residents said there were dozens of reports of attempted break-ins, which had created an atmosphere of fear in their neighborhood.
In September 2011, the Twin Lakes residents held an organizational meeting to create a neighborhood watch program. Zimmerman was selected by neighbors as the program's coordinator, according to Wendy Dorival, Neighborhood Watch organizer for the Sanford Police Department.
Three weeks prior to the shooting, on February 2, 2012, Zimmerman called police to report a young man peering into the windows of an empty Twin Lakes home. Zimmerman was told a police car was on the way and he waited for their arrival. By the time police arrived, the suspect had fled. On February 6, workers witnessed two young black men lingering in the yard of a Twin Lakes resident around the same time her home was burglarized. A new laptop and some gold jewelry were stolen. The next day police discovered the stolen laptop in the backpack of a young black man, which led to his arrest. Zimmerman identified this young man as the same person he had spotted peering into windows on February 2.
Zimmerman had been licensed to carry a firearm since November 2009. In response to Zimmerman's multiple reports regarding a loose pit bull in the Twin Lakes neighborhood, a Seminole County Animal Services officer advised Zimmerman to "get a gun", according to a friend, rather than rely on pepper spray to fend off the pit bull, which on one occasion had cornered his wife. Although neighborhood watch volunteers are not encouraged to carry weapons, Sanford Police Chief Bill Lee acknowledged that Zimmerman had a legal right to carry his firearm on the night of the shooting.