Federal forces have been called in to track down a fugitive out of Walker who has foiled two large searches in the past week.

A 16-hour manhunt for 33-year-old Dennis Shampine on Thursday came up empty.

Friday morning, Walker police Capt. John Sharp said the U.S. Marshals Department Fugitive Task Force had been called in to assist in Shampine’s capture.

His current location is unknown, Sharp said.

On Friday, deputies responded to calls from residents reporting sounds in sheds or dogs barking suspiciously near Thursday’s search area, but there was not an organized search team, the captain said.

Agencies scoured the swamps near the Frenchtown Road Conservation Area for Shampine, wanted on two counts of robbery, one count of aggravated battery and two counts of failure to register as a sex offender.

For the second time in a week, Shampine eluded capture.

A State Police investigator spotted him near the Amite River Bridge on Florida Avenue around 7:30 a.m., police have said. Authorities searched the area with dogs and helicopters equipped with infrared radar until about 10:30 p.m., when fog and darkness made it unsafe to fly and for ground teams to avoid holes and snakes, Sharp said.

Anyone who sees Shampine is asked to call 911 and not to engage him. Officers do not have evidence he is armed, Sharp said, but Shampine has resisted officers on multiple occasions and was even bitten by a police dog in one past incident.