Mark W. Werkheiser was in a bitter custody battle with the mother of his children, Elizabeth Collazo.
The two were supposed to be in court on Thursday for their latest hearing. Werkheiser was shot to death that morning. Collazo never showed up in court, according to The Morning Call.
Werkheiser, 38, was shot multiple times. He was found dead inside his Williams Township home.
"It's not a random act, and there should be no concern on the part of the neighbors," Terence Houck told the paper. He's the lead prosecutor on the case. District Attorney John Morganelli said Collazo is a person of interest in their investigation.
Werkheiser and Collazo had four children together. Two girls, 16, who are twins and two boys, ages 13 and 10, according to court records. After Werkheiser was killed, a Northampton County judge granted his sister custody of the children.
Werkheiser's attorney, Richard Shiroff, characterized him as a very concerned father. "I'm not sure what happened, but he seemed to be a non-confrontational type of person," Shiroff said.
A woman who lives by Collazo told The Express Times that Collazo is known as a hard worker and frequently worked two jobs.
"I'm 53, and in my whole life, I've never met a kinder person," the neighbor told the paper. "That is God's truth."
Fan, follow and download: Get the latest from NBC10.com anytime, anywhere. Follow us on Twitter, Facebook, our mobile site and NBC10.com. Sign up for our breaking news newsletter. And, get breaking news delivered right to your mobile phone -- just text PHIBREAKING to 639710 to sign up. (Message and data rates may apply.)