May 22 (Reuters) - The U.S. Justice Department should

take Boeing ( BA ) to trial in a criminal fraud case stemming from two

fatal 737 MAX plane crashes and reject a tentative deal to allow

the planemaker to avoid prosecution, a lawyer for some of the

victims' families said.

Lawyer Paul Cassell said in a letter to the Justice

Department on Thursday seen by Reuters that allowing Boeing ( BA )

to evade a trial or guilty plea would be a miscarriage of

justice.

He added that the government's proposal would effectively

allow Boeing ( BA ) to become its own probation officer by allowing it

to avoid an independent monitor and instead hire its own

compliance consultant.