Authorities say the driver who ran away from the scene following a Christmas Eve hit-and-run crash off of I-195 that killed an 81-year-old Monmouth County woman has been charged with leaving the scene of a fatal crash and driving with a suspended license.

According to police, Roberto Alcazar-Sanchez, 27, of Jackson, took off running Christmas Eve around 6 p.m. after they say he was behind the wheel of a Chevy Silverado when it smashed into a Mercedes driven by Norman and Phyllis Shtab on the exit ramp off I-195 to Cedar Swamp Road.

Phyllis died two days later, while Norman survived. The couple were on their way to a Christmas dinner. 

During the investigation, police say the suspect's girlfriend, Reyna Mendez, lied to them during questioning. She's now been charged with hindering apprehension. The family of Phyllis Shtab suffered even more heartache when three days later, their pet dog Sammy, who was traveling with them Christmas Eve and survived the crash, ran away from their home. He was later found safe.

Phyllis' granddaughter, Megan Shtab, called for Alcazar-Sanchez Tuesday to turn himself in. She said her grandmother loved Christmas, fashion, and had an amazing sense of humor. 

There is still no sign of Alcazar-Sanchez. A warrant has been issued for him.