Melissa Ketunuti Murder: Suspect charged in death of Philadelphia doctor, report says

(CBS) - A 36-year-old man was charged Thursday morning in the killing of a pediatrician who was found bound and burned inside her downtown Philadelphia home, CBS Philly reports.

Pictures: Phila. doctor found dead, bound and burned

Sources told Philly.com that the man was taken into police custody Wednesday after being captured on surveillance video near 35-year-old Melissa Ketunuti's house around the time of her slaying. 

The suspect is an exterminator who had a job scheduled in the area and allegedly followed Ketunuti to her home, Philly.com reported. He was seen leaving about an hour later.

Police searched through his house in Levittown, which he shared with his girlfriend, a young child and the girlfriend's stepfather, according to Philly.com. The man's girlfriend was also questioned by detectives.

Police searched through his silver Ford F-150 truck for any link to Ketunuti's death and recovered potential evidence from the vehicle, Philly.com reported.

Authorities said firefighters responding to Ketunuti's home Monday afternoon found her body on fire in the basement, with her ankles and wrists bound. The body was found with a rope around the neck and police believe she was strangled.

Ketunuti was a second-year infectious diseases fellow and researcher at Children's Hospital of Philadelphia, according to The Associated Press. 

Police said they don't know whether she knew her killer, but there were no signs of forced entry. A reward of $35,000 was being offered for information leading to the arrest and conviction of the suspect.

Complete coverage of the Melissa Ketunuti case on Crimesider