Complex sentence: Later when Chuck visits Gaby to reveal he knows that Alejandro was her stepfather she tells him he would be opening an official case, she then tries to call the rehab center only to learn that Carlos has checked himself out so she goes out to find him.
Split into simpler sentences: Later when Chuck visits Gaby to reveal he knows that Alejandro was her stepfather, he tells her he would be opening an official case. Gaby then tries to call the rehab center only to learn that Carlos has checked himself out, so she goes out to find him.