(Portland, OR)  --  Police are investigating a stabbing that left a man critically wounded in Portland's Old Town neighborhood.  The stabbing happened late Monday night at the Pacific Tower Apartments on Northwest 4th Avenue.  Authorities say 37-year-old Jacob Pedro Shroyer had been stabbed multiple times and was rushed to a hospital.  Police say it was a random attack.  The suspect is described as a black man with a large build.