Michael James Costanzo

Michael James Costanzo appears via video Tuesday in Gallatin County Justice Court.

A West Yellowstone man is accused of hitting a woman with a baseball bat that had screws in it.

Michael James Costanzo, 43, is charged with felony assault with a weapon. He appeared Tuesday in Gallatin County Justice Court before Judge Bryan Adams.

Bail was set at $15,000.

Around noon on Monday, law enforcement responded to a report of a man wielding a baseball bat with screws in it at an apartment on Gibbon Avenue in West Yellowstone, according to charging documents. Costanzo had screwed three lag bolts and two screws in the bat, police said.

Charging documents say that Costanzo, while holding the bat, confronted a woman he shared an apartment with when she got home around 2 a.m. The woman left.

The woman came back about two hours later. Costanzo met with the woman in the parking lot and swung the bat at her and chased her into the apartment.

The woman caught the bat and escaped from the apartment, police said.

The woman came back around noon to retrieve her belongings. Costanzo again confronted her and smashed her cellphone when she dropped it, court documents say. The woman again left the apartment.

Police said in charging documents the woman had a swollen thumb, a broken nail and a four small puncture wounds in her hand.

According to charging documents, Costanzo was awaiting trial in West Yellowstone City Court for forgery, resisting arrest and damage to rental property, among other violations.

If convicted, Costanzo could face up to 20 years in prison and up to a $50,000 fine.

Freddy Monares can be reached at fmonares@dailychronicle.com or at 406-582-2630.

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