SPOKANE, Wash. -

Spokane police are looking for a man who was talking on his cell phone when he may have fallen off a cliff in late March.

Leighton Welch, a Spokane Falls Community College student, disappeared March 28 and no one has seen or heard from him since.

Welch's fiancée, Michonda Weaver, was talking to Welch on his cell phone when he mentioned something about a cliff and a dog and then she heard him scream.

"He was pretty much talking to himself about the cliff and them he was talking about the dog and in mid-sentence he screamed and it sounded like his phone hit something and went dead and that was the last time I heard from him," Weaver said.

Weaver called police and because it was possible Welch had fallen and needed help, Detective Jeff Barrington wasted little time looking for him.

"He's contacted friends and family, he's contacted the last people Leighton had spoken to. He's done a lot to try and find him," Weaver said.

Barrington asked T-Mobile to triangulate where Welch was standing when he made that last phone call to his fiancée. Cell towers put Welch near Coeur d'Alene Park in Browne's Addition and fortunately not on a cliff. Still, Weaver worries more with each passing day.

"I felt like maybe he was alive the first week or so but with the weather conditions, I think he did fall. He just would not have up and left his family, he just wouldn't have," Weaver said.

Welch certainly has a lot to live for. He's on the honor roll at SFCC and about to enroll at Eastern Washington University. If he's simply bolted from his pending marriage, he's got very little to start a new life somewhere else.

"His clothes, his car, I've got his social security card, school ID, I've got his backpack. His shoes, I've got everything he owns in my house," Weaver said.

Weaver says if Welch's disappearance is about having cold feet then she can deal with that. But it's the waiting and worrying that's hurting her and if Welch is alive she just wants him to call someone and say he's OK.