She is the Grosse Pointe teen killed on Dec. 22 when she was sitting in a car waiting for friends on the east side of Detroit.
The reward has been raised $50,000 to a total of $150,000 for information that leads to the arrest of the suspect who shot Stalker to death and wounded three of her friends.
A light color sedan approached and 30 rounds were fired into Stalker's car.
A similar case, one involving Christina Samuel, has been said the be getting less attention.
Samuel, a young African-American Detroit woman home from college was shot to death while sitting in a car with a friend also in Detroit.
Detroit Police Chief James Craig said that he disagreed with the opinion that Stalker's case was getting more publicity.
Craig said different cases move at different paces depending on the information police have.
Stalker's grandfather said he has grown close to Samuel's family and says they do not feel slighted in the difference of reward money.
The $150,000 has been donated by private benefactors and is not anonymous. Police say they will need a face-to-face meeting with whoever steps forward with information.
That is separate from the $12,500 offered by Crime Stoppers which allows tipsters to remain anonymous.
Crime Stoppers can be contacted at 1-800-SPEAK-UP and Detroit police at (313) 596-5300.