Published: Nov 25, 2013 6:19 PM EST
Updated: Nov 25, 2013 6:51 PM EST

FORT MYERS, Fla. - "These have been very trying months. I lost my son, that's not the natural order of things," said Delretta Addison, mother of Aaron.

Aaron Addison, 22, was gunned down on September 13th as he walked along South Street in Fort Myers.

"To lose a child is a horrible thing in itself, and to lose one so violently," said Delretta.

Witnesses told police they saw a white four door car, pull up beside Addison, then shoot him, in broad daylight.  

"Somebody can come forward, somebody has seen something, too many people out on the street," said his brother Brandon.

To this day, FMPD are still looking for the suspects, now hoping this poster can push someone to come forward.

"There are a lot of people who have seen this, and not come forward, I would really like them to. This is a solvable crime," said Detective Emily DeStefanis.

Addison's senior portrait now sits where he was last seen alive.

If you are walking past the sign, you'll see several quotes from MLK Jr. Family say they picked the quotes because MLK was an inspiring man and they hope to inspire any witnesses to come forward.

"We wanted to do something to make a statement, so when people pass by this everyday, they remember and they feel what the mom is feeling and the family is feeling," said Detective DeStefanis.

A plea from the family for help in solving his murder.

"The holidays are coming and people will be sitting down to give thanks. I'll be giving thanks for the little time I had with my son, but I won't be able to give thanks with my son," said Delretta.

We asked the Fort Myers Police Department, why this case?

Detectives say they like to try different things with various crimes, to keep the cases active.