Jace called 911 himself and told the operator he shot his wife, according to evidence presented at trial. Her body was found inside the couple's home along with their two children, who were unharmed.
Jace, who has remained in custody since his arrest, is scheduled to appear for sentencing June 10.
In addition to The Shield, Jace also appeared in the show Southland as well as films Boogie Nights, Planet of the Apes and Forrest Gump.
April was a Biola University counselor, and after her death the school established a scholarship in her name. The scholarship awards "underrepresented students serving or planning to serve in an urban context who have experienced or witnessed violence in their home or neighborhood."
"April was a very joyful person," Jonathan Seruyange, associate director of financial aid at Biola University, previously told WHO. "She was very caring. Very joyful. Always ready to joke and laugh with people. She was easy to get to know."
"She was really well-loved across the campus," said Seruyange. "Hearing about that kind of thing happening to someone well loved was a huge shock and something that our office all took very hard.”