Police are investigating a hit and run in the Bronx that killed 27-year-old pedestrian Wally Dominguez and injured another.   

The two men were crossing Third Avenue near 181st Street at about 5:30 a.m. Monday when a BMW slammed into them and rear-ended another vehicle. 

It was the second hit-and-run crash in as many days that did not trigger a new Amber Alert-type system that went into effect Saturday. The new system is supposed to give the public information that could help find hit-and-run drivers. 

"In the bill that was passed and the law that is already in effect, we gave the NYPD the flexibility for them to activate the hit-and-run alert," said City Councilman Ydanis Rodriguez of Manhattan, who authored the law.

Rodriguez says the law gives the NYPD 24 hours to decide to issue an alert. He said an alert likely would not have been declared after Monday’s hit and run because the suspect left the scene on foot. 

"I don't criticize the fact that it was not activated," he said. "What I'm calling for the NYPD and the mayor, to double the number of men and women (in) the investigation squad units, because the amount they have right now is not enough for them to keep track of all the investigations that unfortunately happen in our city."

The law that led to the creation of the system was named in honor of radio personality Jean Paul Guerrero, known as DJ Jinx Paul. He was killed in a 2014 hit and run in East New York. The suspect was not arrested until almost a year later. 

Advocates say that under the right circumstances, the system could help catch a suspect sooner by making more people aware of what's happened and putting them in a position to help.