Hopewell Township police haven't named any suspects in the attack on 81-year-old Dan Santia, who was listed in critical condition Monday at a Pittsburgh hospital. His condition was upgraded Tuesday.
Police say someone forced their way into the man's home late Sunday or early Monday and tied him up before stealing his Cadillac. A caretaker arrived to find Santia later Monday and his car was recovered about 6 p.m. that day.
Police still aren't sure whether the robber took anything else.
Hopewell is about 20 miles northwest of Pittsburgh.