What does Joey Costello try to do when he runs over his brothers dead body in tangerine?

In "Tangerine" by Edward Bloor, when Joey Costello runs over his brother's dead body, he is overwhelmed by grief and guilt. This act symbolizes his internal struggle and the intense emotional turmoil he experiences after losing his brother, which reflects the complex dynamics within their family. Joey's actions serve as a poignant moment that highlights the impact of trauma and loss in his life.