A State Police K-9 tracked down a man who fled early Monday after police saw him driving erratically.
Charges against Jerry A. Martinez, 32, of Lynn, are still being finalized but are expected to include operating under the influence of liquor, negligent operation of a motor vehicle, trespassing and possession of open containers of alcohol and marijuana in a motor vehicle, police said.
Shortly after 2 a.m., Trooper Ralph Dugue and Trooper Thomas Shea from the State Police Tunnels Barracks were on patrol on New Rutherford Avenue in Charlestown, where they saw the driver of a 2003 Chevy Trailblazer commit several motor vehicle violations, police said.
The troopers tried to stop the SUV, police said, but the driver fled. State Police authorized a pursuit as the vehicle continued on Route 99 and then on Route 38, where it blew a tire on a curb.
The SUV continued at about 25 mph before it came to a stop on Mystic Avenue at Butler St. in Somerville, where the driver and passenger got out and ran off, police said.
Troopers detained the passenger immediately, police said, but the driver was combative. A trooper deployed his stun gun, but the suspect was able to scale a fence and escape into the surrounding neighborhood. Troopers from Troop H and two State Police K-9 units set up a perimeter and began a search for the remaining suspect.
Trooper Christopher Thurlow and his K-9 Devaney were searching on Sidney Street in Somerville around 3:20 a.m., when Devaney stopped in front of 61 Sydney St. and pulled hard down the driveway to the backyard and apprehended the suspect wedged between two fences in brush, police said.
Martinez was taken to Massachusetts General Hospital for a dog bite and an injury he suffered while jumping the fence.
The passenger, a 24-year-old East Boston man, was questioned and released.