(CNN) Melissa Gonzalez had recently graduated from college and had her sights set on law school.

But while driving on Interstate 95 in Miami, the 22-year-old was struck and killed by gunfire.

Authorities aren't sure who shot Gonzalez, or why. But they're asking for the public's help.

Gonzalez was driving southbound on I-95 near NW 79th Street around 8:30 p.m. Friday when gunfire broke out, according to Crime Stoppers of Miami-Dade and the Florida Keys

pic.twitter.com/WTVWk79LqG — Crime Stoppers Miami & FL Keys (@CrimeStopper305) January 6, 2020

Julian Veliz Cortina, a passenger in Gonzalez's car, told police the sound came from a dark-colored vehicle, Florida Highway Patrol Lt. Alex Camacho said.

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