A federal judge this week sentenced a Lawrence man to serve more than seven years in federal prison for his role in a drug trafficking case.

U.S. District Judge Carlos Murguia sentenced Lonnie Ray Teichman, 49, after he pleaded guilty to one count of possession with intent to distribute more than five grams of crack cocaine within 1,000 feet of a public school. Teichman is the ninth person to be sentenced in the case.

According to interim U.S. Attorney Lanny Welch’s office, Teichman admitted he participated in a drug trafficking conspiracy in Lawrence.

In 2004, Lawrence police and Douglas County Sheriff drug-enforcement investigators made a series of controlled purchases of crack cocaine at Teichman’s apartment in the 1400 block of East 21st Terrace near Kennedy School. Investigators also determined conspirators used the apartment to manufacture crack cocaine.

Katheryn Alexander, of Lawrence, is the final defendant to be sentenced in the case. Murguia is scheduled to sentence her in October.