A Capitol Heights, Maryland, man has been arrested after he allegedly shot and killed his girlfriend, then tried to hide her body in a “makeshift tomb” inside his home, according to police.

The Prince George’s Police Department said in a news release that 30-year-old Devontae Gray has been charged with first-degree murder and other related charges in the death of 29-year-old Alexis Schuler of Washington, D.C.

The Metropolitan Police Department in D.C. contacted police in Prince George’s County on Jan. 18, for assistance with a missing persons case involving Schuler, who had been reported missing earlier in the week.

On Saturday, the Prince George’s Police Department executed a search warrant at Gray’s home, as part of the investigation.

A Maryland man is accused of killing his girlfriend and hiding her body in a makeshift tomb in his house. (iStock)

The charging documents also noted that when investigators returned to the home on Jan. 19, to execute a search warrant, they located a semi-automatic handgun inside, along with fresh drywall, acetone, lemon ammonia and other cleaning and construction items in the residence.

With help from members of the Prince George’s County Fire Department, drywall was removed, and a “makeshift tomb” was discovered under the stairs, charging documents showed.

A bin located in the space was opened, and inside was a human foot believed to belong to Schuler, police said.

Gray has been charged with first-degree murder and other related charges and remains in custody.