At the bottom of a fire escape in an overgrown lot in Chester, a passerby found the body of 25-year-old Philadelphia man Dino Dizdarevic.
"It was awful. I don't think there are any words that could actually describe what I felt or even my family," Dino's sister Una Dizdarevic said.
Dizdarevic, who lived on North 13th Street in Spring Garden, disappeared Wednesday.
On Friday, his body was discovered with blunt force trauma to the head on Parker Street near 9th Street in Chester.
His sister, Una, came in from their home state of Kentucky.
"He would just light the entire room up itself. He was so intelligent and so many people cared about him," Una said.
Police sources say it appears Dizdarevic met up with someone on the social app, Grindr.
Action News has learned investigators have his phone in evidence.
Action News has recently reported on crimes involving social apps.
Police say a Canadian man was raped and robbed in Center City last month after meeting up with another man using Grindr.
"It's sad for those of us at one time that could be lonely and they prey upon that. They know how to prey upon that. They know which buttons to push and how to take you in," Angela Bobo-Tilden of Chester said.
Dizdarevic was a chemical engineer at a company in Burlington County, New Jersey.
He and his family were refugees from war-torn Bosnia.
"I definitely could not believe that somebody who had been through all that with me could just so easily be taken like that," Una said.
The family has set up a memorial fund in Dino's name. Visit this link to find out more information.