(CNN) Parkland gunman Nikolas Cruz is about to come into more than $430,000 and should get new lawyers, the Broward County Public Defender's Office said in a court filing on Wednesday.

The money is half of a life insurance inheritance worth $864,929.17.

In its motion to withdraw from the case, the public defenders' office said it is prohibited from representing a non-indigent person.

Gordon Weekes, with the public defender's office, said the the money comes from the estate of Cruz's adoptive mother, who died in November 2017.

Cruz massacred 17 people and injured 17 others at his former school, Marjory Stoneman Douglas High School in Florida, in February 2018. It is the deadliest high school shooting in US history.

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