Lifetime movie about a girl's boyfriend being the killer?

Question

I want to know the name of a movie from Lifetime, where the girl's boyfriend ends up being the killer of another girl, a past girlfriend of his? The current girlfriend ends up becoming close friends with the missing girl's mom. At the end, he's in the court room and he talks about how sorry he is.

Answer 1

The Killing Secret (1997 TV movie)
aka The Secret
starring Ari Meyers, Cindy Pickett, Soleil Moon Frye
IMDb synopsis:
Rich and popular Greg Dunleavy's bright future is threatened by the revelation that Emily, a girl from the wrong side of the tracks, is pregnant with his child. Emily wants to keep the baby, but Greg has other ideas. After Emily disappears, Greg's girlfriend, Nicole Voss, becomes close to Emily's mother. When Emily is found murdered, Nicole begins to piece together evidence that points to Greg as the killer.

The current girlfriend finds a button shaped like a pansy flower, which was torn from the other girl's clothes when he murdered her. Some people remember the button.