Louis County killings, Speiss and Hampton said.
Missouri police are sending seven investigators to Chester County to assist in the overall investigation and work the St.
The manhunt started Tuesday, has spread across York and Chester counties, and continues.
Sergie Zacharev in Brentwood and Barbara Goodkin in University City.
Two people can be seen on surveillance videos stealing a license plate and in a purported drug transaction, and at a Missouri motel on Sunday, Missouri police said.
We have attached a video for reference.