A Texas death row inmate's last words before his execution ... Mendoza told police he let himself inside Tolleson's house through a back door that night, per court documents.

Texas death row inmate Moises Mendoza is set to be executed April 23 for the 2004 murder of Rachelle O'Neil Tolleson.

Moises Mendoza used his last words to apologize to Rachelle Tolleson's family before he was executed for her 2004 murder ...

After five years on Texas' death row, convicted rapist and killer Moises ... Mendoza told police he let himself inside Tolleson's house through a back door that night, per court documents.