Numerous people had a reason to murder Mr. Crawford, including his children...

Colin knew his father was having an affair with his ex-mistress and was going to leave his mom.
Phoebe was laundering money through the family's fashion company to deal with her husband's debt to a notorious drug cartel.
Carla isn't really Carla—someone paid her to assume the identity of the oldest Crawford child.

Levi is bisexual and ashamed to come out despite having a secret and supportive boyfriend.
But the Crawford children having motive to kill their father doesn't mean they're actually guilty of murder. And if the truth about the murder doesn't come out sooner rather than later, one or more members of the Crawford family might go down for the murder.