Jenkins' Father to View His Son's Suicide Note

Ryan Jenkins' father is eager to see the letter his son wrote three days before he was was found hanged in a motel room -- so he's making a trek to Buena Park, California to check it out.

Dan Jenkins tells TMZ he's been in contact with the Buena Park Police Department since finding out Ryan wrote a letter on his computer titled "Last Will and Testament" -- which cops called a "suicide note" -- and has set up an appointment with the BPPD to see it sometime next week.

As we first reported ... in the letter, police say Ryan never admits to murdering his wife Jasmine Fiore -- but he does apologize to his family for all the pain he caused them.

The BPPD tells us nothing found on the hard drive changes their view that Jenkins is responsible for Fiore's murder.