SAN ANTONIO (CBSDFW.COM/AP) — An 18-year-old man has been arrested after authorities accused him and another man of beating his mother with baseball bats and then slitting her throat.

San Antonio police say Matthew Dempsey was arrested Tuesday for the death of his mother, Mary Dempsey. The second suspect, 18-year-old Daniel Saucedo, was arrested Wednesday.

READ MORE: Cecile Richards: Supreme Court's Inaction On Texas Abortion Law Could Mean End Of Roe

An arrest affidavit says the young men attacked Mary Dempsey after she walked in on them burglarizing her home. The affidavit says they struck Mary Dempsey with baseball bats before using a kitchen knife to attack her. The documents don’t say which man had the knife.

READ MORE: 'Kids Aren't That Careful At School': Teen Twins Get Vaccinated At Fair Park

According to court records, neither suspect has been assigned an attorney who could speak on their behalf.

Both Dempsey and Saucedo have been charged with capital murder and are being held in the the Bexar County Jail on $1 million bail respectively.

MORE NEWS: Amber Alert Issued For 12-Year-Old Girl Out Of Converse, Texas

(© Copyright 2019 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)