now says, "there is a high probability the doctor was targeted," but offering no other details or motive. hausknecht, who once treated president george h.w. bush, was 65. >> i was shocked. i was stunned. couldn't absorb it. yeah. and i'm still grieving, like many people are. >> reporter: houston homicide detectives are asking people to check any security cameras or dashboard cameras that might have also seen the killer. in the meantime, there is a $5,000 reward. david? >> let's hope it helps. clayton, thank you. when we come back, news tonight about alex trebek. also, a breakthrough for depression. the frightening crash here in new york city. an suv slamming into the front of a restaurant. several trapped. and music legend neil diamond, and what he did. psori. as you and your rheumatologist consider treatments, ask if xeljanz xr is right for you. xeljanz xr is a once-daily pill for psoriatic arthritis. taken with methotrexate or similar medicines, it can reduce joint pain, swelling, and significantly improve physical function.