Trayvon Martin felt his life was in imminent danger

So he confronted his aggressor. A good offense is your best defense. Martin saw Zimmerman's gun.  So he pummeled Zimmerman.

Never Killed Anyone

The lead detective Sirino had never killed anyone in the line of duty.  Neither had my husband's father who was a New York City Policeman for 30 years until the 1980's. When he retired he never carried a gun.   But George Zimmerman  killed his 17 year old neighbor with his concealed 9 millimeter handgun who fought back when Zimmerman was trailing him suspiciously in the Rereat at Twin Lakes in Sanford, Florida at 7:15 p.m.
Like a true sociopath Zimmerman showed no emotion after the killing.  He only showed remorse when when is lawyer told him to at a bail hearing.

Grabbed his cell phone

Trayvon Martin could have interpreted could have thought that was a gun.  He was protecting himself from what he perceived as someone planning to attack him.

WHAT ARE YOU DOING HOMEY?

Homey was Trayvon Martin referring to George Zimmerman.  Later homey George Zimmerman shot Trayvon Martin with his concealed weapon.   Later Zimmerman asked the police woman with a small cross on a chain around her neck who was interviewing him if she were Catholic.  Catholics are not supposed to kill and won't be forgiven feared Zimmerman. Police woman told him she was not Catholic but Christian and that God would forgive self defense murder.
What would Jesus do?  Would Jesus carry a concealed 9 millimeter pistol?  Whatever happened to turn the other cheek, Love thy neighbor as yourself and Thou shall not kill? Bulletin to George Zimmerman the state of Florida and the US government, The Pope and most Western governments do not believe in the death penalty.

EERIE COINCIDENCE

The retention pond or lake at the Retreat at Twin Lakes is shaped just like Zimmerman's gun.  If only he and Trayvon had taken the name literally and retreated from this violent confrontation.  The police dispatcher advised Zimmerman to stay away.  He didn't retreat nor did street smart Martin. 
Who started it?  Who finished it?  Who died?  Who was the killer using unnecessary force on a child?  When did it become against the law to walk around the neighborhood at 7 p.m. where your father lived?
Zimmerman carries his concealed weapon to the supermarket for fear of being attacked by an errant tomato in the vegetable department.
Welcome to Florida!  Got guns?

NINE MILLIMETER GUN

Like a good waitress the female police officer offered him some coffee or soda after he said he had a 9 millimeter gun.  29 year old Zimmerman used that 9 millimeter gun to kill Trayvon Martin age 17.  That's child abuse of the highest order on an unarmed teenager you tried to defend himself from an adult that was following him.

YOU GOT IT

Those were Trayvon Martin's last intelligible words according to George Zimmerman after he shot him.  Trayvon Martin continued to talk but George Zimmerman did not say in his deposition what.  None of the police officers knew how to operate a video tape machine in Sanford,Florida.  Shocking.  It's an audiotape deposition given to a female narcotics officer Singleton.