A newly unsealed search warrant revealed what Tyler Robinson allegedly wrote in a handwritten letter he left for his romantic partner about his plan to shoot Charlie Kirk.

“I left the house this morning on a mission,” Robinson allegedly wrote. “I am likely dead, or facing a lengthy prison sentence. I had the opportunity to take out Charlie Kirk, and I took it.”

Law enforcement had previously disclosed that Robinson had allegedly sent texts to his roommate — who is transgender and has transitioned to female — asking her to “drop what you are doing” and “look under my keyboard.” That’s where authorities say Robinson left a letter confessing to shooting Kirk and apologizing to his partner, who he refers to as Luna.

What he wrote had not been publicly revealed until a number of search warrants that investigators had filed with the courts were recently unsealed.

“I wish we could have lived in a world where this did not feel necessary. I wish I could have stayed for you and lived our lives together,” the letter reads, according to a search warrant affidavit. “I lack the words to express how much I love you, and how very much you mean to me. Please try and find joy in this life. I love you, always, -Tyler.”

Robinson was arrested two days after Kirk was killed on Sept. 10 while speaking at Utah Valley University. Before his arrest, the search warrant affidavit alleges, he also sent a text message to his roommate worried that he was going to be caught, and said he was considering telling police where he was and “going out on my own terms.”

“I have no intention of being drug through the courts in front of the country,” he allegedly wrote.

But that confrontation never happened. Instead, police say Robinson’s parents called a former detective they knew and arranged for the 22-year-old to surrender at the Washington County Sheriff’s Office, in the county where he lived.

Robinson is facing multiple charges, including aggravated murder, in connection with Kirk’s death. Prosecutors have indicated they will seek the death penalty if Robinson is convicted.

He is expected to be in court next Friday, where a judge is expected to hear arguments about whether cameras will be allowed in the courtroom through the duration of Robinson’s case.