As police try to track down a missing Bronx woman, they say they've found blood inside her car and home.
Joan Viau, 52, was last seen Monday afternoon in front of her home in Williamsbridge.
Police say they've since found blood evidence in both her home and car.
Authorities are speaking with the woman's son, Joseph Garcia, as a person of interest after they arrested him for using her credit card while she was missing.
"It looks like it's going to be one of these evidence cases where whoever we grab, the evidence we catch - obtain, I should say - we'll go forward with the case from there," said NYPD Chief of Detectives Robert Boyce. "But right now, we're still looking for the lady. We don't know her wherabouts."
Police say they are also speaking with her boyfriend as a routine part of the investigation.
Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.