The Phoenix Police Chief says it is the department's top priority to catch the Serial Street Shooter in Phoenix.
Investigators have looked into more than 1,500 leads since the shootings started back in March. They believe someone out there knows who is responsible.
Nine shootings and seven people killed, all around Phoenix.
Police say they have received and investigated nearly 1,500 tips so far and hoping for more.
The reward leading to an arrest was previously $50,000 and now police announced an increase to $75,000. They are hoping this will be the final push for someone to come forward.
"Somebody out there knows something and we need that information. We don't want any more victims, we want to solve this thing and we want to do it by six o'clock tonight if possible," said Phoenix Police chief Joseph Yahner.
Phoenix Police held a press conference on Thursday alongside members of local and federal law enforcement to let the public know that solving the Serial Street Shooter case is a top priority.
"There is much or more resources, detectives, officers, cooperating agencies dedicated to solving these murders as any task force that I have seen in my time," said City of Phoenix Mayor Greg Stanton.
Attorney General Mark Brnovich is also increasing the Silent Witness reward for any information leading to an arrest.
"The Arizona Attorney General's Office is announcing today that we are contributing an additional $25,000 dollars to the reward to make sure we are doing everything we can to apprehend this individual," said Attorney General Brnovich.
This additional money boosting the reward to $75,000.
Maricopa County Attorney Bill Montgomery wants to remind the public anyone coming forward with information can remain anonymous and should not fear getting in trouble, especially those concerned with their immigration status.
"Anyone who comes forward to assist with this case whether a witness or a victim, their immigration status will not be considered whatsoever and I will not accept for charging any case that arises out of someone's immigration status that was revealed as a consequence of this investigation," said Maricopa County Attorney Montgomery.
The July 11 incident is the last to be connected to this case.
The suspect is described as a Hispanic male probably driving a white Cadillac or a late 1990s to 2000s black BMW.
Police are asking people to call them or Silent Witness at 480-WITNESS or 480-948-6377.