Tom Latanowich's Barnstable court record. (Lana Jones/WBZ NewsRadio 1030)
BARNSTABLE (WBZ-AM) -- The man police say shot and killed a Yarmouth police officer was arraigned in Barnstable District Court Friday.
Tom Latanowich is charged with murder in the killing of K-9 Officer Sean Gannon Thursday afternoon.
A guilty plea was entered on Latanowich's behalf and he was ordered held without bail.
Latanowich kept his head down; had he looked up, he would have seen at least 100 police officers there to show support for a murdered brother.
Police said Latanowich shot Gannon in the head when police arrived at his home to serve him a warrant.
They say Latanowich has well over 100 priors on his record.
Latanowich's Barnstable record is over 500 pages long--dating back to a negligent operation of a motor vehicle charge in 2005.
Then, there were stolen cars, armed robbery, cocaine possession, assault and battery, vandalism, unlawful possession of a firearm.
His latest charge was assault and battery on a pregnant woman.
The warrant Gannon and other officers were serving Latanowich Thursday afternoon was for a probation violation--Latanowich was out on charges he stabbed a man in Yarmouth in December.
Cape and Islands DA Michael O'Keefe said Latanowich's last sentence was 4-5 years in prison for "a variety of gun charges."
"People get sentenced, people finish their sentence, they get out," O'Keefe said.
O'Keefe was asked if he was frustrated that a man with such a lengthy criminal record was out on bail.
"Those kinds of questions are appropriately asked and examined whenever there's a tragedy like this," he said. "We'll certainly review those things. Is it frustrating? Of course it is."
WBZ NewsRadio 1030's Lana Jones reports