A Michigan woman whose 18-year-old son was fatally shot in 2009 in what police believe was a case of mistaken identity has written a play about the unsolved killing that she hopes will prompt someone to come forward with information that could help investigators catch the killer.

Tickets go on sale Thursday for the Dec. 8 premiere of "Speak Up! Speak Out! A Mother's Cry Against Violence" at Temple Theatre, The Saginaw News reported.

Tiffanny Goodman, of Saginaw, wrote and produced the play. Her son, Ste'von, was shot March 12, 2009, after leaving his grandmother's home. Tiffanny Goodman said she hopes the play will inspire someone to bring information to police. She also wants people to reconsider "no snitch" attitudes in Saginaw and elsewhere.

"I'm running out of things to do as far as reaching out to the community," she told the newspaper earlier this year. "This is a cry out to the community. I believe someone will see this play and come forward to say, 'Enough is enough.'"

The play chronicles her son's unsolved case and envisions a salvation for those who kept the killer's identity secret. Surveillance video shows the shooter in a white Chevrolet Suburban, along with witnesses watching a car chase that began in Saginaw and ended with gunfire in nearby Buena Vista Township.

Her son turned 18 two days before the killing and had just enlisted in the U.S. Navy.

Detectives investigating the case have said no one came forward with information that could lead to an arrest, and the slaying remains unsolved. Tiffanny Goodman, however, said she's certain that someone knows the killer's identity, and hopes the play will bring tips to police.

"It starts out with Ste'von's dreams, what he wanted to be, and also the plan of the enemy," she said, referring to the unidentified killer, the shooter's family and the accomplices that appear in the script. "I don't know the perpetrators so, in my mind, I just used my imagination to explain what happened in their lives."

Themes include school bullying, gun violence, "love and forgiveness," Goodman said.