Authorities continue investigating the shooting death of an 18-year-old man from Duquesne who graduated last month from high school.

Police said Chauncey Williams was shot about 4:30 a.m. Sunday while sitting on his stepdad’s back porch with family and friends along Craig Street. He was rushed to Allegheny General Hospital and later pronounced dead just before 6 a.m.

Courtney Tompkins, Williams' stepmom, said when most people hear about shootings, they assume it's gang-related but she said he was at the wrong place at the wrong time.

Investigators agreed with Tompkins and said they think Williams was not the intended target.

Tompkins said Williams had plans to attend CCAC in the fall and then transfer to Robert Morris University to play football.

“It’s sad to see another young man die,” Tompkins said. “He had a life ahead of him and he was just another young man shot down.”

Detectives have not released any information about possible suspects. So far, no arrests have been made.

Former East Allegheny football coach Dennis Edwards said Williams was a "good-hearted kid" and a running back for the team.

"It's an unfortunate situation that this happened," East Allgheny Superintendent Roger D'Emidio said. "It's a tragedy."           

No other injuries were reported in the shooting.

Williams’ family said his graduation party was scheduled for Thursday, but instead they’ll be planning his funeral. A vigil is scheduled for Tuesday.