(Portland, OR) -- Police are searching for more potential victims of a Washington state man arrested for sexual assault in Portland last week. Police arrested 36-year-old Andrew Graham of Ridgefield last Monday, and detectives believe there might be more victims. Graham allegedly met the adult victim on a dating app and sexually assaulted them near a park. Detectives sent a message to Graham to set up another meeting, and he also said he wanted to pay for sex with a child. Graham drove to the meetup location, where he was arrested. He has prior addresses in Oregon, Washington, Montana, Wyoming, Idaho and Florida.