Thomas Gilbert Jr.

Some parents might have walked away after their child committed murder, too horrified to cope. Shelley Gilbert did the opposite. After her son, Thomas Gilbert Jr., shot and killed his 70-year-old father on Jan. 4, 2015, she paid for his defense attorneys, expert witnesses, and psychiatric examinations. “What he did was not him, it was his disease," she said. (Third in a Series)

In the second installment of a three-part series, Shelley Gilbert, speaks out about her son's increasingly difficult behavior.

In the first installment of a three-part series, Shelley Gilbert, whose son, Thomas, is serving a 30-year term for murdering his father, talks about his childhood.