PORTLAND, Ore. (KATU) – The mother of a Portland activist killed over the weekend in a crash urges mourners not to leave messages on a building near the crash site and to stop talking publicly about the case. Workers have already removed most of that graffiti. Laura Kealiher hadn’t talked publicly about her son’s death until she walked out of the democratic party of Oregon’s northeast Portland headquarters on Tuesday afternoon. Surrounded by graffiti left behind following her son’s death, Laura urged people to stop leaving messages and to stop speculating on the internet about what happened. Laura said, “I...